The value of the expression x² - y when x = 3 and y = 2 is:
7.
4.
1.
11.
In the expression 2x(5 − 3x) the coefficient of x is:
16.
-6.
10.
Simplfy: (x - 5) (x + 4)
x² + 9x - 20.
x² - x - 1.
x² - x - 9.
x² - x - 20.
Given that x = −4, y = 9 the value of y - x² is:
13.
17.
-7.
Given that ab² = xy, then b expressed in terms of a, x and y is:
√(a/xy).
√(xy/a).
√(a-xy).
√(xy-a).
