Question

Calcule o quadrado da diferença de dois termos.

a) (2-y)²=

b) (2x-4)²=

c) (b-c)²=

d) (2a-2b)²=​

Answer 1

a)(2-y)(2-y)= b)(2x-4)(2x-4)= c)(b-c)(b-c)=

4-2y-2y+y²= 4x-8x-8x+16= b²-bc-bc+c²=

4-4y+y² 4x-16x+16= b² -2bc+c²

-12x+16

d)(2a-2b)(2a-2b)=

4a-4ab-4ab+4b²=

4a-8ab+4b²