(3x +a) (bx-3)= 6x^2 +x-15 The equation is true for all values of x, when a and b are constant. What is the value of ab? i did the foil method and came up with 10. Is that correct? or is it -10?
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+10 is correct
Originally Posted by tahirakw (3x +a) (bx-3)= 6x^2 +x-15 The equation is true for all values of x, when a and b are constant. What is the value of ab? i did the foil method and came up with 10. Is that correct? or is it -10? For this to be equal to it requires that , and so as you found.
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