Question

solve these step by step​

Answer 1

Answer:

(i) 2a + 2b

= (2 × 0) + 2 × (-1)

= 0 + (-2)

= -2 is the required value.

(ii) 2a2 + b2 +1

= 2 × 02 + (-1)2 + 1

= 0 + 1 + 1

= 2 is the required value.

(iii) 2a2b + 2ab2 + ab

= 2 × 0 × 0 × (-1) + 2 × 0 × (-1)2 + 0 × (-1)

= 0 + 0 + 0

= 0 is the required value.

(iv) a2 + ab + 2

= 02 + 0 × (-1) + 2

= 0 + 0 + 2

= 2 is the required value.

Step-by-step explanation:

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