Question 9 - Finding Errors - Chapter 12 Class 8 Factorisation

Last updated at August 13, 2026 by

Ex 14.4, 9 - Find and correct the errors(3x + 2)^2 = 3x^2 + 6x + 4

Remove Ads

Transcript

Question 9 Find and correct the errors in the following mathematical statements. 〖"(3x + 2)" 〗^2= 3𝑥^2 + 6x + 4 〖"(3x + 2)" 〗^2= 3𝑥^2 + 6x + 4 Solving L.H.S : 〖"(3x + 2)" 〗^2 Using 〖(𝑎 −𝑏)〗^2=𝑎^2+𝑏^2−2𝑎𝑏 Here a = 3x and b = 2 = 〖(3𝑥)〗^2 + 〖(2)〗^2 + 2 (3x) (2) = (3^2 × 𝑥^2) + 2 × 2 + (2 × 3 × 2) x = 〖9𝑥〗^2 + 4 + 12x ∴ 〖"(3x + 2)" 〗^𝟐= 〖𝟗𝒙〗^𝟐 + 4 + 12x is the correct statement.

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.