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siniylev [52]
3 years ago
7

Solve x2 - 3x = 28 by factoring.

Mathematics
2 answers:
Anastasy [175]3 years ago
8 0

Answer:

<h2>x = -4 or x = 7</h2>

Step-by-step explanation:

x^2-3x=28\qquad\text{subtract 28 from both sides}\\\\x^2-3x-28=0\\\\x^2+4x-7x-28=0\qquad\text{distribute}\\\\x(x+4)-7(x+4)=0\\\\(x+4)(x-7)=0\iff x+4=0\ \vee\ x-7=0\\\\x+4=0\qquad\text{subtract 4 from both sides}\\\boxed{x=-4}\\\\x-7=0\qquad\text{add 7 to both sides}\\\boxed{x=7}

sertanlavr [38]3 years ago
8 0

Answer:

x = -4 or x = 7

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