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# Q.5 When a = 0, b = -1, find the value of the given expressions: $$(i) 2a + 2b$$ $$(ii) 2a^2 + b^2 + 1$$ $$(iii) 2a^2b + 2ab^2 + ab$$ $$(iv) a^2 + ab + 2$$

(i) 2a + 2b
= 2(0) + 2(-1)
= 0 – 2 = -2
$$(ii) 2a^2 + b^2 + 1$$
$$= 2(0)^2 + (-1)^2 + 1$$
=0 + 1 + 1 = 2
$$(iii) 2a^2b + 2ab^2 + ab$$
$$= 2(0)^2 (-1) + 2(0)(-1)^2 + (0)(-1)$$
=0 + 0 + 0 = 0
$$(iv) a^2 + ab + 2$$
$$= (0)^2 + (0)(-1) + 2$$
= 0 + 0 + 2 = 2