Ответ:
1)у=4х^2+7х+2
4х^2+7х+2=0
а=4 b=7 c=2
D=b^2-4ac
D=49-32=17
x=(-7+-√17):8
y=x
2)x^2-8x+7
a=1 b= - 8 c=7
D=64-28=36
x=8+6=14
x=8-6=2
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Ответ:
1)у=4х^2+7х+2
4х^2+7х+2=0
а=4 b=7 c=2
D=b^2-4ac
D=49-32=17
x=(-7+-√17):8
y=x
2)x^2-8x+7
a=1 b= - 8 c=7
D=64-28=36
x=8+6=14
x=8-6=2
y=x