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Minchanka [31]
3 years ago
15

When 7 times a number is added to the square of the number, the sum is 144. Find the number(s).

Mathematics
1 answer:
leva [86]3 years ago
5 0

Answer:

x = 9 and x=-16

Step-by-step explanation:

The equation is

x2 + 7x = 144

Solving that using the formula

x= 9 and x=-16

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1st graph:

Find the slope by looking for two points on the line. Use the formula m = \frac{y_{2}-y_{1} }{x_{2}-x_{1}}

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3rd graph:

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Plug in the end-points of the graph, or (-3, 2) and (4, -1).

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Simplify:

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