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44 votes
44 votes
X^2+12x=15
Solve using Quadratic formula it can’t be a decimal

User Steve Armstrong
by
3.1k points

2 Answers

11 votes
11 votes

Answer:

x = − 6 ± √ 51

Explanation:

The quadratic formula is x= -b ± √b^2-4ac / 2a. A is 1, b is 12, and c would be -15 if we subtract the 15 to the other side. Plugging the numbers in would be x= -12 ± √12^2-4(1)(-15) / 2(1) . x= -12± √144+60/ 2 --> x=-12± √204/2 ---> x= -6± √51

User Gabrielmaldi
by
3.3k points
14 votes
14 votes

Answer:

X=1, -13

Explanation:

User Haresh Chaudhary
by
3.0k points