Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class
Algebra Identities and Formulas
Question 1 (ii) Important Deleted for CBSE Board 2024 Exams
Question 1 (iii) Deleted for CBSE Board 2024 Exams
Question 1 (iv) Deleted for CBSE Board 2024 Exams
Question 1 (v) Important Deleted for CBSE Board 2024 Exams
Question 1 (vi) Important Deleted for CBSE Board 2024 Exams
Question 1 (vii) Deleted for CBSE Board 2024 Exams
Question 1 (viii) Deleted for CBSE Board 2024 Exams
Question 1 (ix) Important Deleted for CBSE Board 2024 Exams
Question 1 (x) Deleted for CBSE Board 2024 Exams
Question 2 (i) Deleted for CBSE Board 2024 Exams
Question 2 (ii) Deleted for CBSE Board 2024 Exams
Question 2 (iii) Deleted for CBSE Board 2024 Exams
Question 2 (iv) Important Deleted for CBSE Board 2024 Exams
Question 2 (v) Deleted for CBSE Board 2024 Exams
Question 2 (vi) Important Deleted for CBSE Board 2024 Exams
Question 2 (vii) Important Deleted for CBSE Board 2024 Exams
Question 3 (i) Deleted for CBSE Board 2024 Exams
Question 3 (ii) Important Deleted for CBSE Board 2024 Exams
Question 3 (iii) Deleted for CBSE Board 2024 Exams
Question 3 (iv) Important Deleted for CBSE Board 2024 Exams
Question 3 (v) Important Deleted for CBSE Board 2024 Exams
Question 3 (vi) Deleted for CBSE Board 2024 Exams
Question 4 (i) Deleted for CBSE Board 2024 Exams
Question 4 (ii) Deleted for CBSE Board 2024 Exams
Question 4 (iii) Important Deleted for CBSE Board 2024 Exams
Question 4 (iv) Deleted for CBSE Board 2024 Exams
Question 4 (v) Important Deleted for CBSE Board 2024 Exams
Question 4 (vi) Deleted for CBSE Board 2024 Exams
Question 4 (vii) Important Deleted for CBSE Board 2024 Exams
Question 5 (i) Deleted for CBSE Board 2024 Exams
Question 5 (ii) Deleted for CBSE Board 2024 Exams
Question 5 (iii) Important Deleted for CBSE Board 2024 Exams
Question 5 (iv) Deleted for CBSE Board 2024 Exams
Question 5 (v) Important Deleted for CBSE Board 2024 Exams
Question 6 (i) Deleted for CBSE Board 2024 Exams
Question 6 (ii) Important Deleted for CBSE Board 2024 Exams
Question 6 (iii) Deleted for CBSE Board 2024 Exams
Question 6 (iv) Deleted for CBSE Board 2024 Exams
Question 6 (v) Important Deleted for CBSE Board 2024 Exams
Question 6 (vi) Deleted for CBSE Board 2024 Exams
Question 6 (vii) Important Deleted for CBSE Board 2024 Exams
Question 6 (viii) Deleted for CBSE Board 2024 Exams
Question 6 (ix) Important Deleted for CBSE Board 2024 Exams
Question 7 (i) Deleted for CBSE Board 2024 Exams
Question 7 (ii) Important Deleted for CBSE Board 2024 Exams
Question 7 (iii) Deleted for CBSE Board 2024 Exams
Question 7 (iv) Important Deleted for CBSE Board 2024 Exams
Question 8 (i) Deleted for CBSE Board 2024 Exams
Question 8 (ii) Deleted for CBSE Board 2024 Exams
Question 8 (iii) Important Deleted for CBSE Board 2024 Exams
Question 8 (iv) Important Deleted for CBSE Board 2024 Exams You are here
Last updated at May 29, 2023 by Teachoo
Question 8 Using (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 , find (iv) 9.7 × 9.8 9.7 ×9.8 = (10−0.3)×(10−0.2) = (10+(−0.3))×[10+(−0.2)] (𝑥+𝑎)(𝑥+𝑏)=𝑥^2+(𝑎+𝑏)𝑥+𝑎𝑏 Putting 𝑥 = 10 , 𝑎 = −0.3 & 𝑏 = −0.2 = (10)^2+(−0.3−0.2)(10)+(−0.3)(−0.2) = 100+(−0.5×10)+(0.3×0.2) = 100−(5/10×10)+(3/10×2/10) = 100−5+6/100 = 95+0.06 = 𝟗𝟓.𝟎𝟔