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Q: X squared plus 9 equals x squared minus 9?

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7(3y-2)-(-4y+9)

{-1,7}

It is: 9-4 = 5

It is a quadratic equation and its solutions are: x = 4 or x = -9

X = √63

Using the discriminant for a quadratic equation the value of k works out as plus or minus 12.

2 squared plus 2 x 3 = 10, 7 squared plus 7 x 2 = 63, 6 squared plus 6 x 5 = 66,8 squared plus 8 x 4 = 96 so 9 squared plus 9 x 7 = 81 + 63 = 144.

44

(x - 1)(2x - 9)

Solve this problem -x squared -40x- 80 =0

5. Just do 9 minus 4. 5 plus 4 equals 9

A minus and a minus makes a plus A plus and a plus makes a plus A minus and a plus or plus and a minus makes a minus 7 - -2 is a minus and a minus Therefore the answer is 7 + 2 = 9

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