Mathematics
Grade-11
Easy
Question
Find the equation whose factors are (x + 4), and (3x - 5).
- 3x2 + 7x - 20 = 0
- 3x2 - 7x - 20 = 0
- 3x2 - 7x + 20 = 0
- 3x2 + 7x + 20 = 0
The correct answer is: 3x2 + 7x - 20 = 0
The given two factors are (x + 4), and (3x - 5).
By the zero product property, the product of these two expressions is equal to zero.
(x + 4) (3x - 5) = 0
x(3x - 5) +4(3x - 5) = 0
3x2 - 5x + 12x - 20 = 0
3x2 + 7x - 20 = 0
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