Question

(x-4) (x+5) polynomials class 9​

Answer 1

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$(x - 4)(x + 5) \\ \\ = {x}^{2} + 5x - 4x - 20 \\ \\ = {x}^{2} + x - 20$

Answer 2

Answer:

(x-4) (x+5)

=x²+5x-4x-20

=x²+x-20