gr 10 math
posted by Rebecca on .
Solve by factoring.
a) x^2 + 3x  28 = 0
(x+7)(x4)
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?

a) If (x+7)(x4) = 0 then x = 7 or 4.
d) x = 4
Yes, you did a and d right, but carry it out all the way.
f) (3x2)(3x+2) = 0
I don't have the time to deal with the remaining problems.