the answer for first is -4 and -7 (-4 + -7) = 11 , -4 x -7 = 28
The answer to the second is -17 and -3 (-17+-3) = 20, -17 x -3 = 51
The answer to the third is -9 and 4 ( -9 + 4) = -5 , -9 x 4 = -36
The answer is obtained by hit and trial method and there are many other algebraic ways to solve this. Since it was a bit easy one, i thought to apply the hit and trial method.
-4 + -7 = -11 4 * 7 = 28 -17 + -3 = -20 17 * 3 = 51 4 + -9 = - 5 4 * -9 = 36
The two numbers that add to -11 and multiply to 28 are -4 and -7. The two numbers that add to -20 and multiply to 51 are -17 and -3. Lastly, the two numbers that add to -5 and multiply to -36 are -9 and 4.
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