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4 votes
Find the value of x that will make A||B

A-
2x + 50
5x - 80
B-
x = [?]

1 Answer

3 votes

Answer:

WE need to factorise (2x+4y)(2x−4y)

Given identity is (x+a)(x+b)=x

2

+(a+b)x+ab

Here x=2x,a=b=4y

Thus we have (2x+4y)(2x−4y)=(2x) 2

+(4y−4y)+(4y)(−4y)=4x2

−16y 2

User Roudan
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