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AfilCa [17]
3 years ago
9

I need help! I will give brainliest if answered correctly​

Mathematics
1 answer:
Inessa [10]3 years ago
8 0

Answer:

4 hrs and 8 mins

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telo118 [61]

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Step-by-step explanation:

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Simplify the expression. ( 5 x 2 − 3 x ) − ( 5 x 2 − 3 x + 1 )
iren [92.7K]

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-1

Step-by-step explanation:

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Solve x2 - 8x - 9 = 0. Rewrite the equation so that it is of the form x2 + bx = c.
barxatty [35]

Answer:

x=9,-1  and x^2+(-8)x=9

Explanation:

we have been given with the quadratic equation x^2-8x-9

we compare the given quadratic equation with general quadratic equation

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substituting these values in the formula for discriminant D=b^{2}-4ac

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Now, substituting the values we will get

x=\frac{-(-8)\pm\sqrt{100}} {2}= \frac{8\pm10}{2}=9,-1

And rewritting the given equation by  shifting 9 to right hand side of the given equation and taking minus inside the bracket so as to convert it in the form of

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Find the perimeter of a rectangle 12.5 cm. long and 3.5 cm wide
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Step-by-step explanation:

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