You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard VIII

Mathematics

Addition and Subtraction of Algebraic Expression

Add the follo...

Question

Add the following:
$m^{2} - 4 m + 5$
$- 2 m^{2} + 6 m - 6$
$- m^{2} - 2 m - 7$
--------------------------

Open in App

Solution

$m^{2} - 4 m + 5$
$- 2 m^{2} + 6 m - 6$
$- m^{2} - 2 m - 7$
--------------------------
$- 2 m^{2} + 0 m - 8$
------------------------------
$\Rightarrow$ $- 2 m^{2} - 8$

Suggest Corrections

Similar questions

Q. Question 3(iv)
Add the following:
(iv)

l^{2} + m^{2}, m^{2} + n^{2}, n^{2} + l^{2} + 2 l m + 2 m n + 2 n l

Q. Add the following:
(i)

x - 3 y - 2 z 5 x + 7 y - z - 7 x - 2 y + 4 z

(ii)

m^{2} - 4 m + 5 - 2 m^{2} + 6 m - 6 - m^{2} - 2 m - 7

(iii)

2 x^{2} - 3 x y + y^{2} - 7 x^{2} - 5 x y - 2 y^{2} 4 x^{2} + x y - 6 y^{2}

(iv)

4 x y - 5 y z - 7 z x - 5 x y + 2 y z + z x - 2 x y - 3 y z + 3 z x

Q. Simplify:

\frac{m^{2} + 3 m}{m^{2} + 4 m + 3} \times \frac{m^{2} - 2 m - 3}{m^{2} - 9}

Q. Add:
(1)

2 x

and

2 x - 3

(2)

4 m^{2} + 7

and

3 m^{2}

(3)

- 6 m - 3

and

9

(4)

- 5 n

and

8 n + 7

(5)

8 x^{2} + 7

and

- 8 x^{2}

(6)

3 x y - 5

and

9 x y

Find the area of hexagon PQRSTU (in $m^{2}$ ) in which QN is perpendicular to PS, RL is perpendicular to PS, TM is perpendicular to PS, UO is perpendicular to PS such that PO= 4 m, ON=2 m, NM= 6 m, ML=2 m, LS= 6 m, UO= 6 m, TM= 8 m, QN= 2 m and RL=4 m.

___

Join BYJU'S Learning Program

Add the following:m2−4m+5−2m2+6m−6−m2−2m−7--------------------------

m2−4m+5−2m2+6m−6−m2−2m−7--------------------------−2m2+0m−8------------------------------⇒−2m2−8

Add the following:
$m^{2} - 4 m + 5$
$- 2 m^{2} + 6 m - 6$
$- m^{2} - 2 m - 7$
--------------------------

$m^{2} - 4 m + 5$
$- 2 m^{2} + 6 m - 6$
$- m^{2} - 2 m - 7$
--------------------------
$- 2 m^{2} + 0 m - 8$
------------------------------
$\Rightarrow$ $- 2 m^{2} - 8$