Which of the following represents the factors of the expression x² - 3x - 40 ?
A.) (x - 8)(x + 5)
B.) (x - 7)(x + 4)
C.) (x + 10)(x - 4)
D.) (x + 6)(x - 9)
A.) (x - 8)(x + 5)
B.) (x - 7)(x + 4)
C.) (x + 10)(x - 4)
D.) (x + 6)(x - 9)
Factor the quadratic expression into two binomials.
The first terms of the two binomials are factors of x²......x and x
The second terms of the two binomials will multiply to get the constant term, -40, and add to get the middle coefficient, -3
x² - 3x - 40
= (x - 8)(x + 5) {factored into two binomials}
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The first terms of the two binomials are factors of x²......x and x
The second terms of the two binomials will multiply to get the constant term, -40, and add to get the middle coefficient, -3
x² - 3x - 40
= (x - 8)(x + 5) {factored into two binomials}
More examples, like this, can be found here.
Ask Algebra House
