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10 votes
10 votes
Solve for x
3x² - 5x + 6 = 10 - 4x​

User KevinY
by
2.8k points

2 Answers

21 votes
21 votes

Answer:
-1, (4)/(3)

Explanation:


3x^(2)-5x+6=10-4x\\\\3x^(2)-x-4=0\\ \\ (x+1)(3x-4)=0 \\ \\ x=\boxed{-1, (4)/(3)}

User Eritbh
by
3.0k points
18 votes
18 votes

Answer:

x = -1
x = 4/3

Explanation:

Hello!

First, let's convert the equation into Standard Form:
ax^2 + bx + c = 0


  • 3x^2 - 5x + 6 = 10 - 4x

  • 3x^2 - x - 4 = 0

We can solve this by factoring the quadratic. We have to find two numbers that multiply to
ac but add up to
b.

  • ac = -12
  • b = -1

The two numbers would be -4 and 3. We can expand -x to -4x + 3x, and then factor by grouping.

Factor


  • 3x^2 - x - 4 = 0

  • 3x^2 +3x - 4x - 4 = 0

  • 3x(x + 1) - 4(x + 1) = 0

  • (3x - 4)(x + 1) = 0

Use the Zero Product Property. Set each factor to zero and solve for x.

3x - 4 = 0

  • 3x = 4
  • x = 4/3

x + 1 = 0

  • x = -1

The solutions to the quadratic are -1 and 4/3.

User Pedro Felix
by
2.7k points