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Mathematics
Kamryn Bridges
23 July, 04:43
For what values of fxis * x ^ 2 - 36 = 5x true?
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Sofia Bonilla
23 July, 06:44
0
x = - 4, x = 9
Step-by-step explanation:
Given
x² - 36 = 5x (subtract 5x from both sides)
x² - 5x - 36 = 0 ← in standard form
Consider the factors of the constant term ( - 36) which sum to give the coefficient of the x - term ( - 5)
The factors are - 9 and + 4, since
- 9 * 4 = - 36 and - 9 + 4 = - 5, thus
(x - 9) (x + 4) = 0
Equate each factor to zero and solve for x
x + 4 = 0 ⇒ x = - 4
x - 9 = 0 ⇒ x = 9
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Rory Crane
23 July, 07:56
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Step-by-step explanation:
x ² - 36 = 5x
x²-5x-36=0
a=1 b = - 5 c=-36
calculate the discriminent b²-4ac ... continu
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