Question

2. If a = -2, find the values of the following polynomials.
(i) 2a +4
(ii) 7-3a
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Answer 1

If a = -2, find the values of the following polynomials.

(i) 2a+4

=2(-2)+4

=-4+4

=0

(ii) 7-3a

= 7-3(-2)

= 7 -6

= 1

Answer 2

Answer:

(i)2a+4=2 (-2)+4=(-4)+4=0

(ii)7-3a=7-3 (-2)=7+6=13

when we multiply two numbers with negative sign then result is positive

(-3)×(-2)=+6

HOPE THIS HELPS!