Question

Multiply : ( 5x+4y ) by ( 2x-3y ). Solve : ( 2+7x ) ( 2-7x )​

Answer 1

Step-by-step explanation:

$\huge{\underline{\tt Solution }}$

$\\ \tt\bull\longrightarrow (5x+4y)(2x-3y)$

$\\ \tt\bull\longrightarrow 5x(2x-3y)+4y(2x-3y)$

$\\ \tt\bull\longrightarrow 10x^2-15xy+8xy-12y^2$

$\\ \tt\bull\longrightarrow 10x^2-12y^2 -7xy$

AND

$\\ \tt\bull\longrightarrow (2+7x)(2-7x)$

$\\ \tt\bull\longrightarrow 2^2-(7x^2)$

$\\ \tt\bull\longrightarrow 4-49x^2$

Answer 2

The Answer is in Attachment

Hope it's Help you