2007-01-09 12:02:13 · 5 answers · asked by yashicaevans2004 1 in Science & Mathematics ➔ Mathematics
5x² – 1 = 74
so5x² = 75
ie x² = 15
So x = ±√15
2007-01-09 12:08:52 · answer #1 · answered by Wal C 6 · 0⤊ 0⤋
5 x 2 - 1 = 74
5 x 2 = 74 +1
10 = 75 WRONG
5 x 2 - 1 = 74
5 x 2 - 1 -74 = 0
10 - 75 = 0
- 85 = 0 WRONG
2007-01-09 16:55:55 · answer #2 · answered by robertonereo 4 · 0⤊ 0⤋
5x2 - 1 = 74
5x2 = 74 + 1 = 75
x2 = 75 / 5 = 15
x = SQRT(15)
2007-01-09 12:10:58 · answer #3 · answered by Allabor 3 · 0⤊ 0⤋
5x^2 - 1 = 74
5x^2 = 74+1 = 75
x^2 = 75/5 = 15
x = +-sqr(15)
2007-01-09 12:08:06 · answer #4 · answered by kellenraid 6 · 0⤊ 0⤋
3x^2 = 108 x=+/-6 4x^2 = 100 x=+/-5 x^2 + 7 = seventy one x=+/-8 49x^2 - sixty 4 = 0 dunno -2x^2 = -162 x= +/-9 9x^2 + 100 = 0 dunno 81x^2 - 121 = 0 dunno 100x^2 = 25 x= +/- a million/2 100x^2 = 121 x= +/- a million.a million 8x^2 = fifty six x= +/- sqrt 7 5 - x^2 = 20 x^2 + 35 = one hundred and 5 h = -16t^2 + 3200 h = -16t^2 + b;; t = a million;; be certain for b "the top of a triangle is two times the size of its base. the component to the triangle is 50 m^2. discover the top and base to the nearest 10th of a meter." it really is all i'm doing.
2016-12-02 01:44:08 · answer #5 · answered by ? 4 · 0⤊ 0⤋