Do it with full steps please .

D e a r s t u d e n t, a . 3 a^{2} + 6 a b + 2 b^{2} f o r a = 2, b = 1 = 3 {(2)}^{2} + 6 \times 2 \times 1 + 2 {(1)}^{2} = 3 \times 4 + 12 + 2 = 12 + 12 + 2 = 26 b . 4 x y^{2} + 7 x^{2} y - 5 x y - 6 x f o r x = 3, y = 2 = 4 \times 3 \times 2^{2} + 7 \times 3^{2} \times 2 - 5 \times 3 \times 2 - 6 \times 3 = 4 \times 3 \times 4 + 7 \times 9 \times 2 - 5 \times 3 \times 2 - 6 \times 3 = 48 + 126 - 30 - 18 = 126 f o r f u r t h e r q u e r i e s p l e a s e s t a r t a n e w t h r e a d t o g e t r a p i d a s s i s \tan c e f r o m o u r e x p e r t s . R e g a r d s

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