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what is the answer to... x2 - 10x + 14 = 0. ?
Solve: x2 - 10x + 14 = 0.
10 plus or minus square root of negative 156 divided by 2
5 plus or minus square root of 44
10 plus or minus square root of 44
5 plus or minus square root of 11
negative 5 plus or minus square root of 11
and please....
Solve the square root of (x + 2) = 6.
x = 4
x = 16
x = 32
x = 34
None of these
3 Answers
- An ESL LearnerLv 71 decade agoFavorite Answer
1)
x^2 - 10x + 14 = 0
x = [-b ±√(b^2 - 4ac)]/2a
a = 1
b = -10
c = 14
x = [10 ±√(100 - 56)]/2
x = [10 ±√44]/2
x = [10 ±√(2^2 * 11)]/2
x = [10 ±2√11]/2
x = 5 ±√11
∴ x = 5 ±√11
= = = = = = = =
2)
√(x + 2) = 6
x + 2 = 6^2
x + 2 = 36
x = 36 - 2
x = 34
- Anonymous5 years ago
x^2 - 10x = -14 x^2 - 10x + 25 = -14 + 25 x^2 - 10x + 25 = 11 (x - 5)^2 = 11 x - 5 = ± √11 x = 5 ± √11
- 1 decade ago
im going to assume its acutally x^2 so:
x^2 - 10x + 14 = 0
5 plus or minus square root of 11
and
sqrt(x+2) = 6
x + 2 = 6^2
x + 2 = 36
x = 36 - 2
x = 34