作业帮2a加1的绝对值+4*|b―4|+(c+1)ˇ2求9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
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![2a加1的绝对值+4*|b―4|+(c+1)ˇ2求9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}](/uploads/image/z/5932331-35-1.jpg?t=2a%E5%8A%A01%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2B4%2A%7Cb%E2%80%954%7C%2B%28c%2B1%29%CB%872%E6%B1%829a%CB%872b%CB%872%E2%80%95%7Bac%CB%872%E2%80%95%5B4a%CB%872c%E2%80%953ac%CB%872%5D%E2%80%956a%CB%872c%7D)
2a加1的绝对值+4*|b―4|+(c+1)ˇ2求9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
2a加1的绝对值+4*|b―4|+(c+1)ˇ2求9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
2a加1的绝对值+4*|b―4|+(c+1)ˇ2求9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
2a加1的绝对值+4*|b―4|+(c+1)ˇ2=0
2a+1=0 b-4=0 c+1=0
a=-1/2 b=4 c=-1
9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
=9aˇ2bˇ2―{acˇ2―aˇ2c―6aˇ2c}
=9aˇ2bˇ2―acˇ2+7aˇ2c
=9(-1/2)ˇ2*4ˇ2―(-1/2)*(-1)ˇ2+7*(-1/2)ˇ2*(-1)
=36+1/2-7/4
=34又1/4
2a加1的绝对值+4*|b―4|+(c+1)ˇ2=0
2a+1=0 b-4=0 c+1=0
a=-1/2 b=4 c=-1
9aˇ2bˇ2―{acˇ2―[4aˇ2c―3acˇ2]―6aˇ2c}
=9aˇ2bˇ2―{acˇ2―aˇ2c―6aˇ2c}
=9aˇ2bˇ2―acˇ2+7aˇ2c
=9(-1/2)ˇ2*4ˇ2―(-1/2)*(-1)ˇ2+7*(-1/2)ˇ2*(-1)
=36+1/2-7/4
=137/4
因为a=-1, c=2a, b=|c|
所以a=-1, c=-2, b=2
原式=1/2a²-5ac-2(3a²c-a²b)+3(3ac+4a²c)
=1/2a²-5ac-6a²c+2a²b+9ac+12a²c
=1/2a²+(-5ac+9ac)+(-6a²c+12a...
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因为a=-1, c=2a, b=|c|
所以a=-1, c=-2, b=2
原式=1/2a²-5ac-2(3a²c-a²b)+3(3ac+4a²c)
=1/2a²-5ac-6a²c+2a²b+9ac+12a²c
=1/2a²+(-5ac+9ac)+(-6a²c+12a²c)+2a²b
=1/2a²+4ac+6a²c+2a²b
当a=-1, b=2, c=-2时
原式=1/2×(-1)²+4×(-1)×(-2)+6×(-1)²×(-2)+2×(-1)²×2
=1/2×1+4×1×2+6×1×(-2)+2×1×2
=1/2+8-12+4
=1/2
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