Question

Solve 3x^2-12=-12 by graphing the related function.

1)There is one solution: 24squared
2)There is no solution
3)There are two solutions: +-24squared
4)There are no real number solutions

Answer 1

The given function is :

3 x² - 12 = -12

Adding 12 to both L HS and R HS

3 x²- 12 +12= -12 + 12

3 x²=0

x²=0

x=0

without Solving Graphically, got a single solution, x=0,which satisfies the above function.

Now,checking Graphically, as this is quadratic function ,number of times it crosses the X axis ,are solution of this Quadratic Function.

The function crosses , the X axis just once,

So,there is unique Solution, which is, x=0.

None of the option is true.

Answer 2

the answer is 3x^2-12=-12, imiplies 3x^2 = - 12 + 12 = 0
so 3x^2 = 0 implies x = 0
there is one solution, x =0