Do you need to know what two numbers multiply to -128 and add to 90? In other words, do you need to find the two numbers whose product is -128 and sum is 90? No problem! The two numbers that multiply to -128 and add to 90 are as follows:
-1.40043
91.40043
Here is the math to prove that our above answer to "What two numbers multiply to -128 and add to 90?" is correct:
Multiply:
-1.40043 × 91.40043 ≈ -128
Add
-1.40043 + 91.40043 = 90
The answers above are rounded if necessary. Therefore, if you double check that the answer above is correct by using a calculator, you may find it to be slightly off.
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