What is the next step in solving 0 = x2 + 6x – 10 by completing the square, after you cut 6 in half?
2 answers:
Answer:
see below
Step-by-step explanation:
0 = x^2 + 6x – 10
Add 10 to each side
10 = x^2-6x
Take the coefficient of x
-6
Divide by 2
-6/2 =-3
Square it
(-3)^2 =9
Add 9 to each side
10+9 = x^2-6x+9
We use -3 for the square term
19 = (x-3)^2
Take the square root of each side
±sqrt(19) = x-3
Add 3 to each side
3±sqrt(19) = x
Answer:
Step-by-step explanation:
0 = x^2 + 6x – 10
Add 10
10 = x^2-6x
-6
Divide by 2
-6/2 =-3
Square it
(-3)^2 =9
10+9 = x^2-6x+9
-3 for the square ter
19 = (x-3)^2
(19) = x-3
Add 3 to each side 3to(19) = x
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sin 30 = x/4
sin 30 = 0.5
0.5 = x/4
x = 2
5u - (-20u) - u - 18u + (-11u) = 10
5u + 20u - u - 18u - 11u = 10
-5u = 10
-5(-2) = 10
So, in conclusion, X, is equal to -2.
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