Factorize x2 - 2x - 3xy completely
(x - 2)(3x - y)
(x - 3y)(x - 2)
(x - 3y)(x - 3y)
(3x + y)(x - 2)
Correct answer is B
x2 - 2x - 3xy + 6y = x(x - 2) -3y(x - 2)
= (x - 3y)(x - 2)
If (2x + 3)3 = 125, find the value of x
1
2
3
4
Correct answer is A
(2x + 3 )2 = 125
2n + 3 = 3\(\sqrt{125}\)
2x + 3 = 5
2x = 5 - 3
x = \(\frac{2}{2}\)
= 1
If \(\frac{3}{2x} - \frac{2}{3x} = 4\), solve for x
\(\frac{4}{5}\)
\(\frac{4}{13}\)
\(\frac{5}{24}\)
\(\frac{13}{24}\)
Correct answer is C
\(\frac{3}{2x} - \frac{2}{3x} = 4\)
\(\frac{9 - 4}{6x}\); \(\frac{5}{6x}\) = 4
5 = 24x ; x = \(\frac{5}{24}\)
they are both empty
their union is an empty set
their intersection is an empty set
one of them is a subset of the other
Correct answer is C
No explanation has been provided for this answer.
Express the square root of 0.000144 in the standard form
1.2 x 10-4
1.2 x 10-3
1.2 x 10-2
1.2 x 10-1
Correct answer is C
\(\sqrt{0.000144}\) = 0.012
= 1.2 x 10-2