9000088803
Level:
A
Evaluate the following expression at \(x = \frac{1}
{2}\).
\[
1 - \frac{x - 2}
{2x + 1}
\]
\(\frac{7}
{4}\)
\(\frac{1}
{4}\)
\(\frac{5}
{4}\)
\(\frac{3}
{4}\)
Polynomials and fractions
9000088804
Level:
A
Simplify the following expression.
\[
\frac{2s - 8rs}
{16r^{2} - 1}
\]
\(- \frac{2s}
{4r+1}\)
\(\frac{2s}
{4r+1}\)
\(\frac{2s}
{4r-1}\)
\(\frac{2s}
{1-4r}\)
9000088805
Level:
A
Simplify the following expression.
\[
\frac{a^{4} - 1}
{1 - a^{2}}
\]
\(- a^{2} - 1\)
\(a^{2} + 1\)
\(a^{2} - 1\)
\(1 - a^{2}\)
9000088809
Level:
A
Simplify the following expression.
\[
\left ( \frac{1}
{m - n} - \frac{1}
{m + n}\right )\cdot \left (\frac{m^{2} + 2mn + n^{2}}
{2n} \right )
\]
\(\frac{m+n}
{m-n}\)
\(0\)
\(\frac{m(m+n)}
{n(m-n)} \)
\(2\)
9000088810
Level:
A
Simplify the following expression.
\[
\left (x -\frac{1}
{x}\right )\cdot \left (1 - \frac{x}
{x + 1}\right )
\]
\(\frac{x - 1}
{x} \)
\(\frac{x - 1}
{x + 1}\)
\(\frac{1 - x}
{x + 1}\)
\(\frac{1 - x}
{x} \)
9000101601
Level:
A
Expand \((1 + x)\left (x^{2} + x - 1\right )(1 - x)\).
\(- x^{4} - x^{3} + 2x^{2} + x - 1\)
\(x^{4} - x^{3} + 2x^{2} + x + 1\)
\(- x^{4} + x^{3} - 1\)
\(x^{4} + x^{3} - 2x^{2} + x - 1\)
9000101602
Level:
A
Simplify the polynomial \((x - 1)(x + 1)\left (x^{2} + 1\right ) -\left (x^{2} - 1\right )^{2}\)
into one of the following forms.
\(2\left (x^{2} - 1\right )\)
\(0\)
\(2\left (x^{2} - 1\right )(x + 1)\)
\(x^{2} - 1\)
9000101603
Level:
A
Simplify the polynomial \((x + 1)(x - 1)^{2} - (x - 1)(x + 1)^{2}\)
into one of the following forms.
\(- 2\left (x - 1\right )\left (x + 1\right )\)
\(2\left (x - 1\right )\left (x + 1\right )\)
\(0\)
\(2\)
9000101604
Level:
A
Expand the polynomial \(\left (2x^{2} + 4x\right )^{2} -\left (4x - 2x^{2}\right )^{2}\).
\(32x^{3}\)
\(0\)
\(32x^{3} - 8x\)
\(32x^{3} - 32x^{2} + 8x\)
9000146203
Level:
A
Expand the following expression.
\[
\left (x^{5} -\sqrt{2}y\right )^{2}
\]
\(x^{10} - 2\sqrt{2}x^{5}y + 2y^{2}\)
\(x^{10} -\sqrt{2}x^{5}y + 2y^{2}\)
\(x^{10} - 2\sqrt{2}x^{5}y - 2y^{2}\)
\(x^{10} -\sqrt{2}x^{5}y - 2y^{2}\)