1. 3x^2 + 8x + 4
3x^2 + (2x+6x) + 4
(3x^2+6x) + (2x+4)
3x(x+2) + 2(x+2)
(x+2)(3x+2).
Factor these expressions:
3x^2 + 8x + 4
2x^2 - 7x + 6
5x - 2x^2 - 3
3 answers
2. 2x^2 - 7x + 6
Use the AC method:
A*C = 2*6 = 12 = -2*-6 = -3*-4
Use -3 and -4 for factoring, because their sum = B(-7).
2x^2 + (-3x-4x) + 6
Arrange the 4 terms to form 2 factorable
pairs:
(2x^2-3x) + (-4x+6)
x(2x-3) + -2(2x-3)
(2x-3)(x-2).
3. Use same procedure.
Use the AC method:
A*C = 2*6 = 12 = -2*-6 = -3*-4
Use -3 and -4 for factoring, because their sum = B(-7).
2x^2 + (-3x-4x) + 6
Arrange the 4 terms to form 2 factorable
pairs:
(2x^2-3x) + (-4x+6)
x(2x-3) + -2(2x-3)
(2x-3)(x-2).
3. Use same procedure.
Po5t it.
3 answers