Algebraic Expressions and Identities

$2w$

$0$

$20$

$w + 20$

$10h$

$9h$

$8h$

$11h$

$10 - 4x$

$10 - 2x$

$10 + 2x$

$7x$

$ab - b$

$ab - b^2$

$a - b^2$

$ab - 2b$

$1$

$4a + 5b$

$4a - 5b$

$-4a + 5b$

$xz + xw - yz - yw$

$xz - yw$

$xz + xw + yz + yw$

$xyzw$

$9x^2 - 1$

$9x^2 - 6x + 1$

$3x^2 - 6x + 1$

$9x^2 + 6x + 1$

$9991$

$10009$

$9901$

$9999$

$(2x+3)^2$

$(2x-3)^2$

$(4x-3)^2$

$(2x-9)^2$

$100x^2 - x + 0.01$

$100x^2 - 2x + 0.1$

$100x^2 - 2x + 0.01$

$100x^2 + 0.01$

$0.01p^2 + 0.04pq + 0.04q^2$

$0.1p^2 + 0.04pq + 0.2q^2$

$0.01p^2 + 0.02pq + 0.04q^2$

$0.01p^2 + 0.4pq + 0.04q^2$

$\frac{4}{9}x^2 + 6x + 81$

$\frac{4}{9}x^2 + 12x + 81$

$\frac{2}{3}x^2 + 12x + 81$

$\frac{4}{9}x^2 + 81$