Question

Zh

求解！

( )10. 因式分解2(x+1)--5(x+1)(3-y)-12(y-3)的結果
為何?
(2x+3y-7)(x-4y+13)
(A)
(B) (2x-3y+11)(x+4y-11)
(C) 2(x+3y-8)(x-2y+7)
(D) 2(x-3y+10)(x+2y-5)

Answer 1

✨ 最佳解答 ✨

Mer

令x+1 = A，y-3 = B
2A² + 5AB - 12B = (2A-3B)(A+4B)
= (2x+2-3y+9)(x+1+4y-12)
= (2x-3y+11)(x+4y-11)