solve w/o the quadratic equation
2007-08-23 06:51:34 · 3 answers · asked by Dont Disturb 2 in Science & Mathematics ➔ Mathematics
Factor it -> (7x+3)(x+2)
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(If you FOIL that, it does = 7x^2 +17x +6)
(7x^2 + 14x + 3x + 6)
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Solve For Each Set:
7x+3= 0
7x= -3
x= -3/7
x+2= 0
x=-2
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Answers:
x= -2
x= -3/7
2007-08-23 07:02:14 · answer #1 · answered by j_u_l_i_4_n_n_3 3 · 0⤊ 0⤋
you mean without the quadratic formula? in that case, try factoring. are there factors of 6*7 = 42 that add up to 17? yes, 14 and 3, so
7x² + 17x + 6 = 0
7x² + 14x + 3x + 6 = 0
7x(x + 2) + 3(x + 2) = 0
(7x + 3)(x + 2) = 0
7x + 3 = 0
x = -3/7
or
x + 2 = 0
x = -2
2007-08-23 14:08:43 · answer #2 · answered by Philo 7 · 0⤊ 0⤋
= (7x + 3) (x + 2)
7x + 3 = 0
7x = - 3
x = - 3/7
x + 2 = 0
x = - 2
Answer: x = - 3/7, x = - 2
2007-08-27 08:43:57 · answer #3 · answered by Jun Agruda 7 · 3⤊ 0⤋