If the quadratic formula is used to solve 2x 2 - 3x - 1 = 0, what are the solutions?
2 answers:
Hello :
the discriminat of each quadratic equation : ax²+bx+c=0 ....(a <span>≠ 0) is :
</span><span>Δ = b² -4ac
1 ) </span>Δ > 0 the equation has two reals solutions : x = (-b±√Δ)/2a
2 ) Δ = 0 : one solution : x = -b/2a
3 ) Δ <span>< 0 : no reals solutions
in this exercice : </span><span>2x ² - 3x - 1 = 0....a =2 b =-3 c =-1
calculate : </span>Δ ......................................
The correct answer is Option (C):
3 +/-
/ 4
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