Answer:
C
Step-by-step explanation:
x^2 + (x+3)^2 = 117
x^2 + x^2+6x+9 =117
2x^2 + 6x - 108 = 0
(2x-12)(x+9)=0
x=-9,6
x cannot be negative therefore, x = 6
Answer: x=3
Step-by-step explanation: 3x+2=11
-2 -2
3x=9
x=3
Answer:
A, B, and B.
Step-by-step explanation:
-2
-5
Right on the number line, -2 > -5
3x(5x+6)-8(1+8x)
15x^2+18x-8-64x
15x^2-46x-8 is your final answer
9514 1404 393
Answer:
70
Step-by-step explanation:
In general, put the number in the expression and do the arithmetic.
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Evaluating polynomials is sometimes easier if they are put into "Horner form."
= ((-5x +3)x -8)x +2
= ((-5(-2) +3)(-2) -8)(-2) +2 . . . . use -2 for x
= (13(-2) -8)(-2) +2
= (-34)(-2) +2
= 68 +2 = 70
The value of the expression when x = -2 is 70.