(vii) x + 3x - 10 by x + 5 (Hint: put= y) using factor method divide
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Answer:
x4+3x2-10 by x2+5
=x4-2x2+5x2-10 by x2 + 5
=[x2]2-2x2 +5x2 -10 by x2 +5
x2 = y [given]
=y2-2y +5y-10 by y + 5
=y[y-2] + 5[y-2] by y+5
=[y+5][y-2] by [y+5]
[y+5] cancel
=[y-2]
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