CameraIcon

SearchIcon

MyQuestionIcon

221

You visited us 221 times! Enjoying our articles? Unlock Full Access!

Coordinate Axes in Three Dimensional Space

-3a+b+42a-3b-...

Question

Evaluate: $- 3 (a + b) + 4 (2 a - 3 b) - (2 a - b)$

Open in App

Solution

We have, $- 3 (a + b) + 4 (2 a - 3 b) - (2 a - b)$
$= - 3 a - 3 b + 8 a - 12 b - 2 a + b$
$= - 3 a + 8 a - 2 a - 3 b - 12 b + b$
$= 8 a - 5 a - 15 b + b$
$= 3 a - 14 b$

Suggest Corrections

thumbs-up

1

Similar questions

Q. Simplify:
−3(a + b) + 4(2a − 3b) − (2a − b)

Q. Factorise the expression

(2 a + b^{2} - 4 (2 a + b))

2 a - [3 b - {a - (2 c - 3 b) + 4 c - 3 (a - b - 2 c)}]

∣ ∣ ∣ ∣ \begin{matrix} a & a + b & a + b + c 2 a & 3 a + 2 b & 4 a + 3 b + 2 c 3 a & 6 a + 3 b & 10 a + 6 b + 3 a \end{matrix} ∣ ∣ ∣ ∣ = a^{3}

Q. Question 10
ABCD is a trapezium with parallel sides. The ratio of ar (ABFE) and ar (EFCD) is:

A) a:b
B) (3a + b) : (a + 3b)
C) (a + 3b) : (3a + b)
D) (2a + b): (3a + b)

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Coordinate Axes in 3D Space

MATHEMATICS

Watch in App

explore_more_icon

Explore more

Coordinate Axes in Three Dimensional Space

Standard XII Mathematics

Join BYJU'S Learning Program

CrossIcon