Solve for X.
6. x2 - 4 = 0
7. 9x2 - 4 = 0
8. x2 - 4 = 5
9. x2 - 2x - 8 = 0
10. x2 + 7x = -12
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Solve for X.
6. x2 - 4 = 0
7. 9x2 - 4 = 0
8. x2 - 4 = 5
9. x2 - 2x - 8 = 0
10. x2 + 7x = -12
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Answer:
6. x² - 4 = 0
x² = 4
√x² = √4
x = 2
7. 9x² - 4 = 0
9x² = 4
√9x² = √4
3x = 2
x = 2/3
Answer:
6. x=± 2
7. x=± 2/3
8. x=± 3
9. x= -2, x=4
10. x= -3, x= -4
Step-by-step explanation:
6. x²-4=0
x²=4
x=±2
7. 9x²-4=0
9x²=4
x²=4/9
x= ±2/3
8. x²-4=5
x²=5+4
x²=9
x=±3
9. x²-2x-8=0
(x+2)(x-4)
x= -2 x=4
10. x²+7x=-12
x²+7x+12=0
(x+3)(x+4)
x= -3 x= -4