3 Tutor System
Starting just at 265/hour

# Q.10 Simplify the expression and find its value when a = 5 and b = – 3. $$2(a^2 + ab) + 3 – ab$$

$$2(a^2 + ab) + 3 – ab$$
$$= 2a^2 + 2ab + 3 – ab$$
$$= 2a^2 + 2ab – ab + 3$$
$$= 2a^2 + ab + 3$$
Putting, a = 5 and b = -3, we get
$$= 2(5)^2 + (5)(-3) + 3$$
= 2 × 25 – 15 + 3
= 50 – 15 + 3
= 53 – 15 = 38