Question
Subtract: $3l(l - 4m + 5n)$ from $4l(10n - 3m + 2l)$
✓
Answer
$4l(10n - 3m + 2l) - 3l(l - 4m + 5n)$
$= 40ln - 12lm + 8l^2- 3l^2+ 12lm - 15ln$
$= 8l^2- 3l^2- 12lm + 12lm + 40ln - 15ln$
$= 5l^2+ 25ln$
$= 40ln - 12lm + 8l^2- 3l^2+ 12lm - 15ln$
$= 8l^2- 3l^2- 12lm + 12lm + 40ln - 15ln$
$= 5l^2+ 25ln$
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
Fill in the blanks. If $r$ is the radius of the base and $h$ be the height of a cylinder, then its lateral surface area is ________ sq units.
→Write true $(T)$ or false $(F)$ for the following statement: There is no perfect cube which ends in $4.$
→The following numbers are obviously not perfect square. Give reason.
23453
23453
Test the divisibility of the following numers by $5: 1056$
→Fill in the blanks: A quadrilateral has ______ sides.
Number of students appearing for class $X$ $CBSE$ examination increases from $91,422$ in $1999-2000$ to $11,6054$ in $2008–09.$ Increase in the number of students appeared is approximately $27\%.$
→Convert the following percengages to fractions and ration:
$0.3\%$
→$0.3\%$
Complete the following, so as to make a true statement: A quadrilateral has ....... sides.
Explain the situations represented by the following distance-time graph:
Write the additive inverse of the following rational number:
$\frac{3}{-11}$
→$\frac{3}{-11}$