问题
计算题
(1)计算(x+3)(x+4)﹣x(x﹣1)﹣14
(2)因式分解:ax2+2a2x+a3
答案
解:(1)(x+3)(x+4)﹣x(x﹣1)﹣14,
=x2+7x+12﹣x2+x﹣14,
=8x﹣2;
(2)ax2+2a2x+a3,
=a(x2+2ax+a2),
=a(x+a)2.
(1)计算(x+3)(x+4)﹣x(x﹣1)﹣14
(2)因式分解:ax2+2a2x+a3
解:(1)(x+3)(x+4)﹣x(x﹣1)﹣14,
=x2+7x+12﹣x2+x﹣14,
=8x﹣2;
(2)ax2+2a2x+a3,
=a(x2+2ax+a2),
=a(x+a)2.