3 years ago

How do i expand (3x+5)^2

Mathematics

2 answers:

shepuryov [24]3 years ago

8 0

I don't know how you expand it but the answer is 3x + 25 unless that's expanding.

alisha [4.7K]3 years ago

3 0

(3x + 5)^2 expands into two binomials: (3x + 5)(3x +5)

from there, you foil them:
(3x + 5)(3x + 5)
multiply the first terms ... 9x^2
the inside terms ... 9x^2 + 15x
outside terms ... 9x^2 + 15x + 15x
last terms ... 9x^2 + 15x + 15x + 25
then add like terms ... 9x^2 + 30x + 25

that's the expanded binomial!!

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What is the equation of the line that passes through the point 4, -6 and has a slope of -3

zheka24 [161]

Y = mx + b. Use this equation for most linear functions. Enter the information that is given to you.
$- 6 = - 3(4) + b$
Multiply the -3 and 4 to get 12.
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Now divide the -12 from both sides.
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Now re-enter the info back into the formula.
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4 0

3 years ago

Please help with this algebra :) there can be multiple answers

lawyer [7]

I am not sure but I think is the last one!!!!

3 0

3 years ago

If the angles of a triangle are in the ratio 1:3:5, what is the measure of the smallest angle

luda_lava [24]

In a triangle, the three interior angles always add to 180°

x + 3x + 5x = 180
9x = 180
x = 180/9
x = 20

<span>the smallest angle = x = 20</span>°

3 0

3 years ago