Question

Qno 11 18 19 20 21 24 26 31 plzzZ fast mates
I'll alot 17 points for it
#explain clearly Pls
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Answer 1

✨Herr is your answer ✨

⭐1. x²-4x+4y-y²

= (x+y)(x-y) -4(x-y)
= (x-y) (x+y-4)

⭐2. x²-y²-4xz+4z²

= x² + 4z² -4xz -y²
= (x-2z)² -y²
= (x-2z-y)(x-2z+y)

⭐3. x(x+z)-y(y+z)

= x²-y²+z(x-y)
= (x-y)(x+y)-z(x-y)
= (x-y)(x+y-z)

⭐4. 9x⁴ -x²-12x -36

= (3x²)² - (x+6)²
= (3x²+x+6)(3x²-x-6)

⭐5. x⁴ +5x² +9

= add & sub. x²
= x⁴ +6x² + 9 -x²
=(x²+3)² -x²
= (x²+3-x)(x²+3+x)

⭐6. 9a²+3a-8b-64b²

= (3a)² - (8b)² + 3a-8b
= (3a-8b)(3a+8b) + 3a-8b
= 3a-8b(3a+8b+1)

⭐7. 9(b+2a)²- 4a²

= [3(b+2a)]² - ( 2a)²
= (3(b+2a) + 2a)(3(b+2a)-2a)
= (3b+8a)(3b+4a)


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