Question

Find the value of (5x + 2y)2 using algebraic identity.

Answer 1

Step-by-step explanation:

(5x+2y)2+(5x−2y)2

=25x2+4y2+20xy+25x2+4y2−20xy

=50x2+8y2

hope it will help you

Answer 2

Answer:

• 25x² + 20xy + 4y²

Step-by-step explanation:

${\small{\bold{(5x+2y)^2 }}}$

${\small{\tt{ = (5x)^2 + 2(5x)(2y) + (2y)^2 \ \ \ \: \: \: \: \: \bigg\lbrace \because (a+b)^2 = a^2 + 2ab + b^2 \bigg\rbrace}}}$

${\small{\tt{= 25x^2 + 20xy + 4y^2}}}$