№1 а) y=8x-x^2-7, y=0 б) y=x^2 y=x^3

Question

№1
а) y=8x-x^2-7, y=0
б) y=x^2 y=x^3

Comments

1)

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8x-x^2-7=0

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d=64-4*7=36=6^2

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a=-8+6/-2=1

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a=-8-6/-2=7

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2) x^2=x^3 x^2-x^3=0 x^2(1-x)=0 x=0 x=1

Answer 1

А) y=8x-x^2-7
x^2-8x+7=0
D=64-28=36
x1=(8+6)\2=7
x2=(8-6)\2=1

Answer 2

Б) y= x^2
сл-но x^2 = x^3
y= x^3
x=0 и 1