Question

(×+10)(×-10)

(y+9x)(y-9x)

(5x-1)(5x+1)

(bc+de)(bc-de)
​

Answer 1

Respuesta

$(a-b)(a+b)=a^{2} -b^2$

(x-10)(x+10)=x^2-100

(y-9x)(y+9x)=y^2-81x^2

(5x-1)(5x+1)=25x^2-1

(bc+de)(bc-de)=b^2c^2-d^2e^2