1. Add the following:
(i) 3x and 7x (ii) -5xy and 9xy
2 Simplify each of the following:
(i) 7x3y +9yx3 (ii) 12a2b + 3ba2
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Answer:
Step-by-step explanation:
1.
i) 3x and 7x
= (3+7)x
= 10x
ii) -5xy and 9xy
(-5+9)xy
= 5xy
2.
Multiply numerals
i) 7x3y + 9yx3
= 21xy + 27xy = 48xy
ii) 12a2b + 3ba2
=24ab + 6ab = 30 ab
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