Question

(X+9) x (X-5)
(B-8) x (B-10)
(M-7) x (m+3)
(Y+12) x (Y+4)

Answer 1

Boa Josefina

(x + 9)*(x - 5) = x² + 9x - 5x - 45 = x² + 4x - 45 

(b - 8)*(b - 10) = b² - 8b - 10b + 80 = b² - 18b + 80

(m - 7)*(m + 3) = m² - 7m + 3m - 21 = m² - 4m - 21

(y + 12)*(y + 4) = y² + 12y + 4y + 48 = y² + 16y + 48 

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