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pentagon [3]
3 years ago
10

When 5 is subtracted from the square of a number, the result is 4 times the number. Find the negative solution.

Mathematics
1 answer:
wariber [46]3 years ago
8 0

Answer:

-1

Step-by-step explanation:

You can write it as...

x^{2} -5=4x

Carry the 4x

x^{2} -4x-5=0

Then use the quadratic formula to solve, since you want to find the negative solution, you don't need to find the positive solution, so we will have

(4-\sqrt{16+20}) /2=\frac{4-6}{2}=\frac{-2}{2} =-1

Therefore our answer is -1

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