Question

(x-7)(x+3) Using this formula( x+a)(x+b)=x²+(a+b)x + a×b​

Answer 1

Answer:

here

a=-7

b=3

so,

x²+(-7+3)x+(-7)(3)

x²-4x-21

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Answer 2

Answer:

(x+a)(x+b)

={x+(-7)}{x+3}

=x^2+(-7+3)x+(-7×3)

=x^2-4x-21

Step-by-step explanation:

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