Factorize the following i. 5x2 − 9x + 4 ii. 16x2 − 25y2
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When we factorise an expression, we write it as a product of its ... Example 2 : Which of the following is an identity? ... 3x2y2 (7y + 9x) ... ( iv) 5x2 – 3xy + 4y2 – 9, 7y2 + 5xy – 2x2 + ..
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Answer:
i) 5x2-9x+4
= 5x2-5x-4x+4
=5x(x-1)-4(x-1)
=(5x-4)(x-1)
ii) 16x2-25y2
=(4x) 2-(5y) 2
=(4x+5y)(4x-5y)
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