Algebra Quiz 01

(a - b)^2 =

a^2 + b^2

a^2 + 2ab + b^2

a^2 - b^2

a^2 - 2ab + b^2

Factorize x^2 + x - 72

(x - 8)(x + 9)

(x - ?72)^2

(x + 8)(x - 9)

(x - ?72)(x + ?72)

Simplify a(c - b) - b(a - c)

ac - 2ab - bc

ac - 2ab + bc

ac + 2ab + bc

ac + bc

Simplify 15ax^2 ⁄ 5x

3ax^2

5ax^2

5ax

3ax

Expand and simplify (x - 5)(x + 4)

x^2 - x - 20

x^2 - x - 9

x^2 - x - 1

x^2 + 9x - 20

Factorize -20x^2 - 9x + 20

(5 - 4x)(4 - 5x)

(5 + 4x)(4 - 5x)

(5 + 4x)(4 + 5x)

(5 - 4x)(4 + 5x)

Expand and simplify (x + y)^3

x^3 + 3xy(x - y) + y^3

x^3 + y^3

x^3 - y^3

x^3 + 3xy(x + y) + y^3

Simplify 5⁄2 ÷ 1⁄x

2x ⁄ 5

2 ⁄ 5x

5 ⁄ 2x

5x ⁄ 2

Coefficient of x^2 in 4x^3 + 3x^2 - x + 1 is:

2

-1

3

1

Expand and simplify (x - y)(x + y)

x^2 - y^2

x^2 + 2xy + y^2

x^2 - 2xy + y^2

x^2 + y^2