7. Add 3a - 2b + c and 5a + 8b -7c.
8. Find the product of (r2 - y2)(x² + y2)
9. fx + = 3 find the value of x? +
10. Factorise: a² +2+1
11. Find three consecutive numbers whose sum is 108
12. Divide: x2 + 6x + 5 by x + 1.
13. Simplify: (x + 1)(x - 1)(x? + 1).
14. Find the least number which must be added to 493
perfect square
15. Find x so that(?) ***
that(3) ***) "=0"
(51-2
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these are the ways to do number 7 and 12 I hope it helps you. sorry I couldn't do others cause I couldn't understand the questions
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