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dem82 [27]
3 years ago
7

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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5/8 of 17 is 10.625!
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HELP WITH 12 PLZ???!?!?!?!!!!?
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Can you show the full question?

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What is the sum of the measures of the measures of the exterior angles of this triangle?
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A cuboid measures 6cm by 3cm by 2cm<br><br> Draw a net of the cuboid
Tresset [83]

Answer:

See attachment for cube

Step-by-step explanation:

Given

Length = 6cm

Width = 3cm

Height = 2cm

Required

The net of the cuboid

A cuboid has 6 faces.

The dimension of these faces are:

Length and Width; Length and Height;

Length and Width; Length and Height;

Width and Height; Width and Height;

This means that the faces will have the following dimensions:

6cm by 3cm; 6cm by 2cm

6cm by 3cm; 6cm by 2cm

3cm by 2cm; 3cm by 2 cm

Taking into account the above measurements and dimensions, you draw 6 faces, then join similar sides lengths.

<em>See attachment for net of the cuboid</em>

4 0
3 years ago
11x + 12 = 8x - 9 ... please
Marat540 [252]

Assignment: \bold{\Solve \ Equation: \ 11x+12=8x-9}

<><><><><><><>

Answer: \boxed{\bold{x=-7}}

<><><><><><><>

Explanation: \downarrow\downarrow\downarrow

<><><><><><><>

[ Step One ] Subtract 12 From Both Sides

\bold{11x+12-12=8x-9-12}

[ Step Two ] Simplify

\bold{11x=8x-21}

[ Step Three ] Subtract 8x From Both Sides

\bold{11x-8x=8x-21-8x}

[ Step Four ] Simplify

\bold{3x=-21}

[ Step Five ] Divide Both Sides By 3

\bold{\frac{3x}{3}=\frac{-21}{3}}

[ Step Six ] Simplify

\bold{x=-7}

<><><><><><><>

\bold{\rightarrow Mordancy \leftarrow}

4 0
3 years ago
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