Question

zero☃️

求詳解

1 下)二135太2
2 (KR 2) te

 呈  凡

Answer 1

✨ 最佳解答 ✨

Ny-Ålesund

前面先各自分解，再重新組合

原式 = (x+6)(x+10)(x+2)(x-2) +135
= (x+6)(x+2)(x+10)(x-2) +135
= (x^2 +8x +12)(x^2 +8x -20) +135
= (A+12)(A-20)+135
= A^2 -8A -105
= (A-15)(A+7)
= (x^2 +8x -15)(x^2 +8x +7)
= (x^2 +8x -15)(x+1)(x+7)

zero☃️

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