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Artyom0805 [142]
3 years ago
5

I need help on this question, It's for Algebra 1 Simplify the following expression. (7x2 + 4x - 7) + (4x2 - 6x + 4)

Mathematics
1 answer:
Drupady [299]3 years ago
8 0
You can only add like terms

exg
you can addd
2+4
2x+4x
2x^2+4x^2
2x^3+4x^3

but not
2+4x
2x^2+2x^3


so when adding like terms keep the exponent
4x+2x=6x
4x^3+2x^3=6x^3

(7x^2+4x-7)+(4x^2-6x+4)
get rid of the parenthasees
7x^2+4x-7+4x^2-6x+4
group like terms (x^2 with x^2 x with x, etc)

(7x^2+4x^2)+(4x-6x)+(-7+4)
add like terms
11x^2-2x-3

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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}

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