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lubasha [3.4K]
3 years ago
13

When solving for x, what is x squared plus 15 equals -8x

Mathematics
1 answer:
VLD [36.1K]3 years ago
5 0

Answer:

x = - 5, x = - 3

Step-by-step explanation:

Given

x² + 15 = - 8x ( add 8x to both sides )

x² + 8x + 15 = 0 ← in standard form

Consider the factors of the constant term (+ 15) which sum to give the coefficient of the x- term (+ 8)

The factors are 5 and 3, since

5 × 3 = 15 and 5 + 3= 8, thus

(x + 5)(x + 3) = 0 ← in factored form

Equate each factor to zero and solve for x

x + 5 = 0 ⇒ x = - 5

x + 3 = 0 ⇒ x = - 3

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What is the slope intercept form of 10x + 2y =8
antoniya [11.8K]

Slope intercept form is: y = mx + b


Isolate the y. First subtract 10x from both sides


10x (-10x) + 2y = 8 (-10x)


2y = -10x + 8


Isolate the y. Divide 2 from both sides and <em>all</em> terms.


(2y)/2 = (-10x + 8)/2


y = -5x + 4


y = -5x + 4 is your slope intercept form answer.



hope this helps

7 0
3 years ago
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damaskus [11]

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3 years ago
Which expression is equivalent to (5x^3)(2x)^3
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Hello:
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3 0
3 years ago
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Lunna [17]

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Multiply and simplify
aleksandr82 [10.1K]

Answer and explanation:

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2. 8 × 4/8 = 32/8 = 4

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4. 12 × 2/11 = 24/11 = 2 2/11

5. 3 × 5/7 = 15/7 = 2 1/7

6. 2 × 3/5 = 6/5 = 1 1/5

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Hope this helps!

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3 years ago
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