Posted by ALISSA on Tuesday, May 22, 2012 at 12:08am.
13. -2*(-3)^2 = -18.
14. (-2x)^2 = (-2*(-3)^2 = 6^2 = 36.
10. 3x^2 - 4x + 6 = 0.
D = sqrt(B^2-4AC).
D = sqrt(16-72) = sqrt(-56).
The Discriminant is < 0; therefore, we
have no real solutions and 2 imaginary
solutions.
8. sqrt(3b) = -3
Square both sides:
3b = 9
b = 3,
CHECK: sqrt(3*3) = sqrt(9)=+3,AND -3.
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