Factorise 5x² - 25x + 20
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IF a=2,b=-2,find the value
(1). a^2+b^2
(2). a^+ab+b^2
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Step-by-step explanation:
5x² - 25x + 20
=5(x² - 5x + 4)
=5(x² -4x-x+4)
=5x(x-4) -1(x-4)
=5(x-4) (x-1)
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