Solve the Quadratic Equation: x²+3x-4=2x²

Question

Solve the following equation:

x2+3x4=2x2 x^2+3x-4=2x^2

Video Solution

Solution Steps

00:00 Find X
00:03 Arrange the equation so that one side equals 0
00:14 Group terms
00:24 Identify coefficients
00:34 Use the roots formula
00:51 Substitute appropriate values and solve
01:12 Calculate the square and products
01:34 It's not logical to have a root of a negative number
01:42 Therefore there is no solution to the question

Step-by-Step Solution

Given the equation:

x2+3x4=2x2 x^2 + 3x - 4 = 2x^2

Step 1: Move all terms to one side:

Subtract 2x2 2x^2 from both sides to get:

x2+3x42x2=0 x^2 + 3x - 4 - 2x^2 = 0

Simplify this to:

x2+3x4=0-x^2 + 3x - 4 = 0

Step 2: Rearrange to standard form:

Multiply the entire equation by -1 for simplicity:

x23x+4=0 x^2 - 3x + 4 = 0

Step 3: Solve the quadratic equation using the quadratic formula:

Here, a=1 a = 1 , b=3 b = -3 , c=4 c = 4 .

Plug into the quadratic formula:

x=(3)±(3)24×1×42×1 x = \frac{-(-3) \pm \sqrt{(-3)^2 - 4 \times 1 \times 4}}{2 \times 1}

x=3±9162 x = \frac{3 \pm \sqrt{9 - 16}}{2}

x=3±72 x = \frac{3 \pm \sqrt{-7}}{2}

Step 4: Interpret the result:

The discriminant (b24ac b^2 - 4ac ) is negative, 7 -7 , indicating no real solutions.

Conclusion: The equation has no solution in the set of real numbers.

In comparison with the provided choices, the correct choice is:

No solution

Answer

No solution