Answer:
3 to the fourth power, which equals 81.
Step-by-step explanation:
Answer:
C. 3, -7
Step-by-step explanation:
x^2 +4x-21 =0
Factor
What 2 numbers multiply to -21 and add to 4
7*-3 = -21
7-3 = 4
(x+7) (x-3) =0
Using the zero product property
x+7 =0 x-3=0
x+7-7=0-7 x-3+3=0+3
x = -7 x=3
Answer:

Step-by-step explanation:
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Given:

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Collect like terms.

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Simplify

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Hope this is helpful.
Divide by 50 then divide by ten then just add that to 68 the divide by 5