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*** The following questions are forwarded from a school email ***I'm having trouble factoring:15x^2+8x-12=08x^2-6x+1=016x^2+25=0Thank you
Worksheet_05Lesson -1-5) -16x^2+25=0 16x^2 - 25 = 0 Apply A^2 - B^2 = (A + B)(A - B) (4x + 5)(4x - 5) = 0 4x + 5 = 0, or 4x - 5 = 0 x = -5/4, 5/4* Your original question, 16x^2+25=0, has no solution, since 16x^2 cannot be negative.Homework -c) 8x^2-6x+1=0 4x -1 2x -1 (4x - 1)(2x - 1) = 0 4x - 1 = 0, or 2x - 1 = 0 x = 1/4, 1/2e) 15x^2+8x-12=0 5x +6 3x -2 (5x + 6)(3x - 2) = 0 5x + 6 =0, or 3x - 2 = 0 x = -6/5, 2/3
*** The following questions are forwarded from a school email ***
ReplyDeleteI'm having trouble factoring:
15x^2+8x-12=0
8x^2-6x+1=0
16x^2+25=0
Thank you
Worksheet_05
DeleteLesson -
1-5) -16x^2+25=0
16x^2 - 25 = 0
Apply A^2 - B^2 = (A + B)(A - B)
(4x + 5)(4x - 5) = 0
4x + 5 = 0, or
4x - 5 = 0
x = -5/4, 5/4
* Your original question, 16x^2+25=0, has no solution, since 16x^2 cannot be negative.
Homework -
c) 8x^2-6x+1=0
4x -1
2x -1
(4x - 1)(2x - 1) = 0
4x - 1 = 0, or
2x - 1 = 0
x = 1/4, 1/2
e) 15x^2+8x-12=0
5x +6
3x -2
(5x + 6)(3x - 2) = 0
5x + 6 =0, or
3x - 2 = 0
x = -6/5, 2/3