Factorise the following
1) 4x² + 20x + 25
2) 9y² - 66yz + 1212²
3) (2x + ⅓)² - (x - ½)²
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Answer:
1) (2x+5)^2
2) (3y-11z)^2
3) (3x+5/6)(x-5/6)
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