5. Factorise: 100x2 - 80xy + 16y2 6. Factorise: 16x4 - 4 7. Factorise: x2 + 6x + 8 8. Factorise: 49y2 - 1 9. Divide 10(x@y?x2 + xyz2 + x?y?z?) by 5x?yz? 10. Simplify: 12(y2 + 7y + 10) + 6(y + 5)
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Answer: 5. 4(( 5x - 2y)( 5x - 2y))
Step-by-step explanation: 100x2 – 80xy + 16y2
4( 25x^2 – 20xy +4y^2)
4( 25x^2 – 10xy – 10xy +4y^2)
4( 5x( 5x - 2y) – 2y( 5x - 2y)
4(( 5x - 2y)( 5x - 2y))
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