Ex 2.4, 4 (v) - Chapter 2 Class 9 Polynomials

Last updated at August 14, 2026 by

Ex 2.4, 4 (v) - Expand (-2x + 5y - 3z)^2 using suitable identities - Ex 2.4

Remove Ads
Teachoo · Class 9 Explore Class 9

Transcript

Ex 2.4, 4 Expand each of the following, using suitable identities: (v) (-2x + 5y 3z)2 (-2x + 5y 3z)2 = ( (-2x) + 5y + (-3z) )2 Using (a + b + c)2 = a2 + b2 + c2 + 2ab + 2bc + 2ac Where a = -2x , b = 5y, c = -3z = (-2x)2 + (5y)2 + (-3z)2 + 2(-2x) (5y) + 2 (5y) (-3z) + 2 (-3z) (-2x) = 4x2 + 25y2 + 9z2 20xy 30yz + 12xz

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.