Factorise:
(a) 4x² - 9y²
(b) x²-1/25
(c) x²a+x²b+ya+yb
(d) y²+11y+24
(e) a²-3a-10
(f) 4x²-z²/100
(g) x²+5x-24
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Answer:
a.( 2x^2-3y^2) (2x^2+3y^2)
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