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Factorise the expressions(i) ax2 + bx(ii) 7p2 + 21q2(iii) 2x3 + 2xy2 + 2xz2(iv) am2 + bm2 + bn2 + an2(v) (lm + l) + m + 1(vi) y(y + z) + 9(y + z)(vii) 5y2 − 20y − 8z + 2yz(viii) 10ab + 4a + 5b + 2(ix) 6xy − 4y + 6 − 9x |
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Answer» Factorise the expressions (i) ax2 + bx (ii) 7p2 + 21q2 (iii) 2x3 + 2xy2 + 2xz2 (iv) am2 + bm2 + bn2 + an2 (v) (lm + l) + m + 1 (vi) y(y + z) + 9(y + z) (vii) 5y2 − 20y − 8z + 2yz (viii) 10ab + 4a + 5b + 2 (ix) 6xy − 4y + 6 − 9x |
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