evaluate the following by using the identity (x-a) (x+b)
(2x-3)(2x+5)
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4x^2+4x-15
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(X+a)(X+b)=x²+(a+b)x+ab
Here,X=2x,a=-3,b=5
(2x-3)(2x+5)=(2x)²+(-3+5)2x+(-3)(5)
=4x²+4x-15
Hope this helps
Here,X=2x,a=-3,b=5
(2x-3)(2x+5)=(2x)²+(-3+5)2x+(-3)(5)
=4x²+4x-15
Hope this helps
right
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