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2 years ago

11

15 subtracted from the square of an integer the result is equal to three less than four times the integer find the negative inte

ger

1 answer:

dangina [55]2 years ago

5 0

Answer:

Let the integer be called "n"

So we have:

n^2-15=4n-3

n^2=4n+12

n^2-4n-12=0

(n+2)(n-6)=0

So, the negative integer is -2.

Let me know if this helps!

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To complete the square, the equation is of the form $ax^{2} +bx+c=0$

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Rewriting the expression $x^{2} +8x=0$ and factoring the trinomial, we have,

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