帮忙解两个一元二次方程4(x+3)²-25=0(x-1)(x+2)=70
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![帮忙解两个一元二次方程4(x+3)²-25=0(x-1)(x+2)=70](/uploads/image/z/8564208-24-8.jpg?t=%E5%B8%AE%E5%BF%99%E8%A7%A3%E4%B8%A4%E4%B8%AA%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B4%28x%2B3%29%26sup2%3B-25%3D0%28x-1%29%28x%2B2%29%3D70)
帮忙解两个一元二次方程4(x+3)²-25=0(x-1)(x+2)=70
帮忙解两个一元二次方程
4(x+3)²-25=0
(x-1)(x+2)=70
帮忙解两个一元二次方程4(x+3)²-25=0(x-1)(x+2)=70
4(x+3)²-25=0
4(x+3)²=25
(x+3)²=25/4
x+3=正负5/2
所以x1=-1/2
x2=-11/2