Question

(a) (× + 9) (×–9)=
(B) (m–1) (m+1)=
(c) (3× + 5)(3×-5)=
(D) (2–7×)(2+7×)=
(E) (m²–5)(m²+5)=​

Answer 1

Explicação passo-a-passo:

(a) (× + 9) (×–9)=

x²-9x+9x-81

x²-81

(B) (m–1) (m+1)=

m²+1m-1m-1

m²-1

(c) (3× + 5)(3×-5)=

9x-15x+15x-25

6x-15x-25

-9x-25

(D) (2–7×)(2+7×)=

4+14x-14x-49x

4-49x