Question

$(x + 7).(x + 5) =$
$(y - 6).(y + 5) =$
$(2a + b).(a + b) =$
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Answer 1

Resposta:

a) x²+12x+35

b)y²-y-30

c)2a²+3ab+b²

Explicação passo-a-passo:

a)(x+7)(x+5)=

x+x+5x+7x+7.5

x²+5x+7x+7.5

x²+12x+35

b)(y-6)(y+5)

y+y+5y-6y-6.5

y²+5y-6y-30

y²-y-30

c)(2a+b)(a+b)

2a.a+2ab+ab+b.b

2a²+2ab+ab+b²

2a²+3ab+b²