abridged multipication

Practice work

100

(x+3)^2

x^2 +6x+9

200

2x−5)^2

4x^2 −20x+25

300

(x+2)(x−2)

x^2−4

400

(3a+4b)^2

9a^2+24ab+16b^2

500

(2x+5)(2x−5)(4x^2+25)

16x^4−25^2

theory

100

Multiply (x+1)(x−1)

x^2−1

200

(3x−2y)^2

9x^2−12xy+4y^2

300

x^2 - 16

(x+4)(x−4)

400

State the formula for the square of a difference.

(a−b)^2=a^2−2ab+b^2

500

Expand and simplify: (a+2b)^2 - (a-2b)^2

8ab

any question

100

Expand (x−2)^2

x^2-4x+4

200

x^2 - 16

(x-4)(x+4)

300

What is the coefficient of the middle term in (x+5)^2?

10

400

State the formula for the square of a sum.

(a+b)^2=a^2+2ab+b^2

500

State the formula for the difference of squares

(a+b)(a−b)=a^2−b^2