Question

3x ^2 = 15 - 4x using standard form formulas.???

Answer 1

Answer:

write the euation in standar form=3x^2=15

x^2=14. write the equation in standard form.

4x-2x^2 =5

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Answer 2

Given

• 3x² = 15 - 4x

To find

• Factors using the formula method

Solution

• 3x² = 15 - 4x
• 3x² + 4x - 15 = 0

✮Compare it to standard form of quadratic equation✮

• ax² + bx + c = 0
• a is 3 , b is 4 , and c is -15

✮Quadratic formula✮

• x = -b±√b²-4ac/2a
• x = -4±√4²-4(3)(-15)/2(3)
• x = -4±√16-(-180)/6
• x = -4±√196/6
• x = -4±14/6
• x = -4+14/6 or x = -4-14/6
• x = 10/6 or x = -18/3
• x = 5/3 or x = -3

∴ x can be 5/3 or -3