Question

expand (4x+2y+7z)^2​

Answer 1

Answer:

16x^2+ 4y^2+ 49z^2+ 16xy + 28yz + 56xz

Step-by-step explanation:

Using formula

(a+b+c)^2= a^2+ b^2+ c^2+ 2ab+ 2bc+ 2ca

(4x + 2y+7z)^2= (4x)^2 +(2y)^2+(7z)^2+2×4x×2y + 2×2y×7z + 2×7z×4x

= 16x^2+ 4y^2+ 49z^2+ 16xy + 28yz + 56xz