Question

a) (x + 2).(y + 3) = b) (a - 2).(b - 7) = c) (y + 6).(z - 6) = d) (2x - 5).(3y - 2) = e) (a + 3).(b + 4) =

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Answer 1

Resposta:

A)

(x + 2) × (y + 3)

xy + 3x + 2y + 2 × 3

xy + 3x + 2y + 6

B)

(a - 2) × (b - 7)

ab - 7a - 2b - 2 × (-7)

ab -7a - 2b + 14

C)

(y + 6) × ( z - 6)

yz - 6y + 6z - 6 × 6

D)

(2x - 5) × (3x - 2)

2x × 3y - 2x × 2 - 5 × 3y - 5 × (-2)

6xy - 4x - 15y + 10

E)

(a + 3) × (b + 4)

ab + 4a + 3b + 3 × 4

ab + 4a + 3b + 12

Explicação passo-a-passo: