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the square of a number is equal to the sum of 21 and 4 times the number. find the number

WHATS THE EQUATION (AM CONFUSED ?)
13 years ago

Answers

Ms. Sue
x^2 = 21 + 4x

13 years ago
LISA
ok thanks
13 years ago
Ms. Sue
You're welcome.
13 years ago
LISA
so its x=7
x= -3
13 years ago

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