02
y2 +24xz
7. Evaluate
(i) (99)
(i) (995)
(iii) (107)
ANSWERS (EXERCISE 3D)
1. (1) a? +452 + 25c2 +4ab + 20bc + 10ac (ii) 42? +b+c2-4ab-
(111) a? + 482 +9c2-4ab + 12bc-bac
2 (i) 4a? + 2562 +49c2 - 20ab +70bc - 28ac
(ii) 9a? +1662 + 25c2 - 24ab - 40bc +30ac
a² 6² ab
-b+2a
16 4
3. (2x + 3y - 4z) (2x + 3y - 4z) 4.(-3x + 4y + 2z)(-3x+4y +
5. (5x-2y + 3z)(5x-2y+32) 6. (4x - 2y + 3z)(4x - 2y + 3z)
7. (1) 9801 (11) 990025 (iii) 11449
4
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ANSWER:
In BODMAS rule or in fraction rule
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