Question

If a = 2, b = 3 and c = - 1, then find the value of 3a2 + 5b2 - c2 + 2ab + 3bc- 5ac.

Answer 1

Answer:

Step-by-step explanation:

3*2*2+5*3*3-1*2+2*2*3+3*3*-1*5*2*-1

=12+90+

Answer 2

a=2,b=3,c=-1

3a^+5b^-c^+2ab+3bc-5ac

=3×2^+5×3^-(-1)^+2×2×3+3×3×(-1)-5×2×(-1)

=3×4+5×9-1+12+(-9)+10

=12+45-10+12+10

=69(Ans)