for 3x^2 + 2x - 7 = 0
discr = 4 -4(3)(-7) = +88
so you have real roots, both irrational
How do you find the discriminant of 3x2+2x-7 and what does it tell you about the equation?
2 answers
b^2-4ac
2^2 -4(3)(-7)
4 + 84 = 88 = 8*11
It tells you that there are two real roots because the discriminant is positive and that the roots will not be whole numbers because there will be a square root of 11 involved.
2^2 -4(3)(-7)
4 + 84 = 88 = 8*11
It tells you that there are two real roots because the discriminant is positive and that the roots will not be whole numbers because there will be a square root of 11 involved.
1 answer