Question

Factor the following completely

1. ײ -25

2. 2 ײ -15× - 8

3. 3ײ + 30× +75

4. ׳ - 27
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Answer 1

1) x²- 25

x²-5²

(x-5)(x+5)

2) 2x²-15x-8

2x²+x-16x-8

x(2x+1)-8(2x+1)

(2x+1)(x-8)

3) 3x²+30x+75

3(x²+10x+25)

3(x+5)²

4) x³ - 27

x³- 3³

(x-3)(x²+3x+9)