3 years ago

What is -7x-3 (9-7x) if x=-1

Mathematics

1 answer:

olga2289 [7]3 years ago

3 0

The correct answer is -20

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How do you find the sum of cube ?

SIZIF [17.4K]

Answer:

$(2x+5)(4x^{2} -10x+25)=0$

Step-by-step explanation:

Given:

The given equation is.

$8x^{3} +125=0$

Find the some of cube.

Solution:

$8x^{3} +125=0$

$2^{3}x^{3} +5^{3}=0$

$(2x)^{3} +5^{3}=0$ ----------(1)

The sum of the cube formula is given below.

$(a^{3} +b^{3})=(a+b)(a^{2} -ab+b^{2} )$ -----------(2)

By comparing equation 1 and equation 2

$a=2x, b=5$

substitute a and b value in equation 2

$((2x)^{3} +5^{3})=(2x+5)((2x)^{2} -(2x)(5)+5^{2})$

$((2x)^{3} +5^{3})=(2x+5)(4x^{2} -(10x)+25)$

$((2x)^{3} +5^{3})=(2x+5)(4x^{2} -10x+25)$

Therefore the sum of the cube $(2x+5)(4x^{2} -10x+25)=0$

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3 years ago

Which data set COULD NOT be represented by the histogram shown?

Murrr4er [49]

Answer:

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Step-by-step explanation:

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2 years ago

State of the triangles in each pair are similar. If so, state how you know they are similar and complete the similarity statemen

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Answer:

SSS, UVD, the answer is D

Step-by-step explanation:

90/9 = 10

70/7 = 10

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2 years ago

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Answer:

g=15.04

Step-by-step explanation:

g=4.7×3.2=15.04

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