Question

3. If a = + 1 and b = -2, find the value of:
(a)a2 + 2ab
(b) a2 + ab + b 2
(c) a² – b2 +4ab
(d) _3a + 5b
(e) – 6a2 + 5ab
(f) – 4 + 5ab


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Answer 1

Answer:

a) =1+2(1)(-2)

=1-4

=-3

b)=1-2+4

=3

c)=1-4-8

=-11

d)=-3-10

=-13

e)=-6-10

=-16

f)=-4-10

=-14

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