Question 6 (ix) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities
Last updated at April 16, 2024 by Teachoo
Algebra Identities and Formulas
Question 1 (i)
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Transcript
Question 6 Using identities, evaluate. (ix) 1.05×9.5 1.05×9.5 = 105/100×95/10 = (105 × 95)/1000 = ((100 + 5) × (100 − 5))/1000 (𝑎+𝑏)(𝑎−𝑏)=𝑎^2−𝑏^2 Putting 𝑎 = 100 & 𝑏 = 5 = ((100)^2 − (5)^2)/1000 = (10000 − 25)/1000 = 9975/1000 = 9.975
