Answered

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QUADRATIC EQUATION â€" WORD PROBLEMS

The sum of two numbers is 5 and their product is â’84. Find these numbers


The answer is 12 , -7

I just need the steps

Sagot :

Rspill6idn

Answer: -7, 12

Step-by-step explanation:

a+b = 5

a*b = -84

a = 5-b

(5-b)*b = -84

-b^2 + 5b + 84 = 0

(-b - 7)(b + 12) = 0

The roots are -7 and 12.

I'm not sure what â€" stands for

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