Question

Factorise the following.

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Answer 1

Answer:

Step-by-step explanation:

1. (2−5)2−812

(2−5)(2−5)−812

(2−5)⋅2−5(2−5)−812

4−52−5(2−5)−812

4−52−52+25−812

4−102+25−812

4−102−812+25

2.(−3)2−1(−4)2

(−3)(−3)−1(−4)2

(−3)−3(−3)−1(−4)2

2−3−3(−3)−1(−4)2

2−3−3+9−1(−4)2

2−6+9−1(−4)2

2−6+9−1(−4)(−4)

2−6+9−1((−4)−4(−4))

2−6+9−1(2−4−4(−4))

2−6+9−1(2−4−4+16)

2−6+9−1(2−8+16)

2−6+9−12+8−16

2−6−7−12+8

−12+2+8−6−7

3.(a+b+x+3)(a+b−x−3).

Explanation:

Use A2−B3=(A+B)(A−B)

The expression is (a+b)2−(x+3)2

(a+b+x+3)(a+b−x−3).

4.2+4−21

2+7−3−21

(+7)−3(+7)

(−3)(+7)

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