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alisha [4.7K]
3 years ago
10

Please provide all steps given to find the answer. Thanks!!! Simplify: 5(2x+9)²

Mathematics
2 answers:
guajiro [1.7K]3 years ago
7 0

Answer:

20x^2 + 180x +405

Step-by-step explanation:

5(2x+9)²

5 ( 2x+9) (2x+9)

FOIL

first

2x*2x = 4x^2

outer: 2x*9 = 18x

inner 2x*9 = 18x

last : 9*9 = 81

Add these together :  4x^2 + 18x+18x +81  = 4x^2+36x+81

5( 4x^2+36x+81 )

20x^2 + 180x +405

gulaghasi [49]3 years ago
4 0

Answer:

20x²+180x + 405

Step-by-step explanation:

Follow PEMDAS to know what you do first

square (2x + 9) by foiling

(2x+9) (2x + 9)

= 4x²+ 36x + 81

Multiply by 5

20x²+180x + 405

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<h3><u>Solution:</u></h3>

Given equation is:

2x + 3y - 6z = 30

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Intercept are the point where equations cut the x- axis, y- axis and z- axis.

<em><u>Thus, at x- axis :</u></em>

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<h3>Thus the intercept is (15, 0, 0)</h3>

<em><u>Thus at y - axis:</u></em>

x and z both are zero

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<h3>Thus the intercept is (0, 10, 0)</h3>

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x and y are both zero

So substitute x = 0 and y = 0 in given equation

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-6z = 30

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<h3>Thus the intercept is (0, 0, -5)</h3>

Thus, intercept of equation 2x + 3y - 6z = 30 is (15,0,0) ,(0,10,0) and (0,0,-5)

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