Question

The coordinates of point $A$ on x-axis are given as $(a+2,a-2$). Then what's the value of $a^2$.

• A. 9
• B. 4
• C. 2
• D. 3

Answer 1

The correct option is B 4

Given:
Coordinates = $(a+2,a-2$) ....(i)

Since, the point $A$ lies on x-axis.

Coordinates of point A = $(x,0)$ ...(ii)

Comparing equation (i) with equation (ii) we get,

$(a-2)$ = $0$

$a$ = $2$

$a^2=2^2$

$a^2=4$.

Therefore, value of $a^2$ is 4.