<img src="https://tex.z-dn.net/?f=x%5E%7B2%7D%20%2Bx%20%3D%2012" id="TexFormula1" title="x^{2} +x = 12" alt="x^{2} +x = 12" alig

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astra-53 [7]

2 years ago

n="absmiddle" class="latex-formula">
answer ?

Mathematics

2 answers:

OlgaM077 [116]2 years ago

6 0

Hey there!

x^2 + x = 12

SUBTRACT 12 to BOTH SIDES

x^2 + x - 12 = 12 - 12

SIMPLIFY IT!
x^2 + x - 12 = 0

SET the FACTORS to EQUAL to 0

x - 3 = 0 OR x + 4 = 0

SIMPLIFY IT!
x = 3 or x = -4

Therefore, the answer is:

x = 3 or x = -4

Good luck on your assignment & enjoy your day!

~Amphitrite1040:)

Kipish [7]2 years ago

4 0

Answer:

x = 4 and x = -3

Step-by-step explanation:

⇒ x² + x = 12

⇒ x² + x - 12 = 0

⇒ x² + 3x - 4x - 12 = 0

⇒ x(x + 3) - 4(x + 3) = 0

⇒ (x - 4)(x + 3) = 0

⇒ x = 4 and x = -3

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