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gr 10 math

posted by on .

Solve by factoring.
a) x^2 + 3x - 28 = 0
(x+7)(x-4)
d)x^2 + 8x + 16 = 0
(x+4)(x+4)
f)9x^2 - 4 = 0
i)8k^2 - 3k = 0
k)x^2/6 - x + 4/3 = 0
did i do a and d right? Can you show me how to solve the rest?

  • gr 10 math - ,

    a) If (x+7)(x-4) = 0 then x = -7 or 4.

    d) x = -4

    Yes, you did a and d right, but carry it out all the way.

    f) (3x-2)(3x+2) = 0

    I don't have the time to deal with the remaining problems.

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