Question
Evaluate: $(4m - 2)(m^2 + 5m - 6)$
✓
Answer
$(4m - 2)(m^2 + 5m - 6)$
$= 4m (m^2 + 5m - 6) - 2(m^2 + 5m - 6)$
$= 4m^3 + 20m^2 - 24m - 2m^2 - 10m + 12$
$= 4m^3 + 20m^2 - 2m^2 - 24m - 10m + 12$
$= 4m^3 + 18m^2 - 34m + 12$
$= 4m (m^2 + 5m - 6) - 2(m^2 + 5m - 6)$
$= 4m^3 + 20m^2 - 24m - 2m^2 - 10m + 12$
$= 4m^3 + 20m^2 - 2m^2 - 24m - 10m + 12$
$= 4m^3 + 18m^2 - 34m + 12$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Express : 2.8 mm as a per cent of 2.24 cm
A rectangular park has length $=23 \frac{2}{3} \mathrm{~m}$ and breadth $=16 \frac{2}{3} \mathrm{~m}$. Find the area?
→Find $x$ in the following case:
→Write 60.974. 2.8753, 0.001789 and 400.04, correct to four significant figure.
The length and the breadth of a rectangle are 36 cm and 28 cm. If its perimeter is equal to the perimeter of a square, find the side of the square.
Check whether the following quantities form a proportion or not? $2 \frac{1}{2}, 5 \frac{1}{2}, 3.0$ and 6.0
→If 3 dozen eggs cost Rs. 90, find the cost of 3 scores of eggs. (1 score = 20)
A hall is 16 m long and 12 m broad. Find the cost of carpeting it at $₹ 615$ per $m ^2$, after leaving a margin of 1 metre all around.
→Subtract : $3 p^3-5 p^2 q+2 q^2$ from $q^2+p^2 q-4 p^3$
→The cost of 11 pens is ₹ $24 \frac{3}{4}$. Find the cost of one pen
→