Quadratic expressions Questionbank

True: the expression simplifies to $x$.

False: the expression simplifies to $x^2$.

True: the expression simplifies to $2x - 9$.

False: the expression simplifies to $x^2 - 18$.

$(1 - 8x)^2$

$(8x - 1)(8x + 1)$

$(1 - 8x)(1 + 8x)$

$(1 - 32x)(1 + 32x)$

$x^2 + 16$

$x^2 + 8x + 16$

$x^2 + 4x + 16$

$x^2 + 8x + 8$

$(x - 7)(x - 3)$

$(x + 21)(x - 1)$

$(x + 7)(x - 3)$

$(x - 7)(x + 3)$

$(5x - 6)(10x + 12)$

$2(5x - 6)^2$

$2(5x - 6)(5x + 6)$

$2(25x^2 - 36)$

$2x^2 + 5x - 12$

$2x^2 + 5x + 12$

$2x^2 - 5x - 12$

$2x^2 + 11x - 12$

An identity must always be set to zero, while an equation can have any value on the right-hand side.

An identity is true for all possible values of the variable, while an equation is only true for specific values.

There is no difference; the terms 'identity' and 'equation' are synonyms in algebra.

An equation is true for all possible values of the variable, while an identity is only true for specific values.

$-2$

$2$

$15$

$-15$

$y^3 + y^2 - 1$

$y^2 + 2x - 5$

$2y - 5y^2 + 7$

$y + 12$

$p = -6, q = 1$

$p = 3, q = 2$

$p = -3, q = -2$

$p = 6, q = -1$