Q1 of 26 Page 1

If and then find the value of x.


To find: value of x


Formula used:



Therefore,



= 2x(x + 3) – (-2)(-3x)


= 2x2 + 6x – 6x


= 2x2


According to question:



⇒ 2x2 = 8



⇒ x2 = 4


⇒ x = 2 or -2


Hence, the value of x can be 2 or -2.


More from this chapter

All 26 →
2

Use elementary column operation in the following matrix equation:

 3

Write the number of all possible matrices of order with each entry 1, 2 or 3.

 4

Write the position vector of the point which divides the join of points with position vectors and in the ratio
2:1.

 5

Write the number of vectors of unit length perpendicular to both the vectors and