Advertisements
Advertisements
Question
Solve for x: `sqrt(3x^2)-2sqrt(2)x-2sqrt3=0`
Solution
`sqrt(3x^2)-2sqrt(2)x-2sqrt3=0`
Hencea= `Hence a=sqrt3, b=-2sqrt2,c=-2sqrt3`
`x=(-(-2sqrt2)+-sqrt((-2sqrt2)^2-4xxsqrt3xx(-2sqrt3)))/(2xxsqrt3)`
`=(2sqrt2+-sqrt(8+24))/(2sqrt3)`
`=(2sqrt2+-sqrt32)/(2sqrt3)`
`=(2sqrt2+-4sqrt2)/(2sqrt3)`
`=(2sqrt2+4sqrt2)/(2sqrt3),(2sqrt2-4sqrt2)/(2sqrt3)`
`=(3sqrt2)/(2sqrt3),(-2sqrt2)/(2sqrt3)`
`x=sqrt6,-sqrt(2/3)`
RELATED QUESTIONS
In the following determine the set of values of k for which the given quadratic equation has real roots:
2x2 + kx + 3 = 0
If a, b, c are real numbers such that ac ≠ 0, then show that at least one of the equations ax2 + bx + c = 0 and -ax2 + bx + c = 0 has real roots.
Find the value of the discriminant in the following quadratic equation:
2x2 - 3x + 1 = O
Solve the following quadratic equation using formula method only
16x2 - 24x = 1
Determine whether the given values of x is the solution of the given quadratic equation below:
6x2 - x - 2 = 0; x = `(2)/(3), -1`.
Find the value of k for which the given equation has real roots:
kx2 - 6x - 2 = 0
Solve the following by reducing them to quadratic equations:
z4 - 10z2 + 9 = 0.
Find the value(s) of m for which each of the following quadratic equation has real and equal roots: x2 + 2(m – 1) x + (m + 5) = 0
State whether the following quadratic equation have two distinct real roots. Justify your answer.
(x + 4)2 – 8x = 0
State whether the following quadratic equation have two distinct real roots. Justify your answer.
`(x - sqrt(2))^2 - 2(x + 1) = 0`