Question

Calcule os seguintes produtos:

a)(5a + c)(5a -c)=
b)(5x-8)(5x+8)=
c)(4x+4y)(4x-4y)=
d)(3x -4)(3x +4)=

Answer 1

a)(5a+c)(5a-c)=$25a^{2} - c^2$
b)(5x-8)(5x+8)=$25x^{2} - 64$
c)(4x+4y)(4x-4y)=$16x^{2} - 16y^2$
d)(3x-4)(3x+4)=$9x^{2} - 16$