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qwelly [4]
2 years ago
9

The difference between a number and its square is 20. Find thenumbers.​

Mathematics
1 answer:
Elena L [17]2 years ago
4 0

Answer:

-4 or 5

Step-by-step explanation:

let number be x

x²-x=20

Rearrange

x²-x-20=0

(x+4)(x-5)=0

Separate

x+4=0, x-5=0

x=-4 or 5

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Answer:

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Step-by-step explanation:

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    Now substitute these values in the expression,

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                  = \frac{8(x^2-a^2)}{(x-a)}

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b). \frac{f(x+h)-f(x)}{h} = \frac{8(x+h)^2-8x^2}{h}

                      = \frac{8(x^2+h^2+2xh)-8x^2}{h}

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Step-by-step explanation:

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