use the identity (x+a)(x+b)=x2+(a+b) x+ab to find the the following products
a, (x+3)(x+7)
b, (4x+5)(4x+3)
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Step-by-step explanation:
Answer
Given: (4x−5)(4x−1)
Using,(x+a)(x+b)=x
2
+(a+b)x+ab we get,
=16x
2
+(−5−1)4x+(−5)(−1)
=16x
2
−24x+5
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