Best Answer

The discriminant for the quadratic is b2-4ac = 302 - 4*4*45 = 900 - 720 = 180

Since 180 is not a perfect square, the roots of the equation are irrational and it is far from straightforward to solve such an equation by factoring.

Q: How do you solve 4x2 minus 30x plus 45 by factoring?

Write your answer...

Submit

Still have questions?

Continue Learning about Math & Arithmetic

2(5x - 1)(3x - 2)

15x2 - 30x -720 = 15(x - 8)(x + 6).

-30x=6.3 x=-.21

x = 0.666666666666667 so 100 + (30x0.67) + (30x0.67) = around 180

For the equation: x5+7x3-30x=0 The highest exponent in the entire equation is 5 (from x5), so the equation is of degree 5.

Related questions

2(5x - 1)(3x - 2)

15x2 - 30x -720 = 15(x - 8)(x + 6).

-30x=6.3 x=-.21

Pressumably you want to solve for "x". Divide left and right by minus 30. That will leave the "x" alone on the left, and the answer on the right.

That can be factored to (3x - 5)(3x - 5) or (3x - 5)2

That's 35 - 30x. The GCF of 35 and 30x is 5.

x = 0.666666666666667 so 100 + (30x0.67) + (30x0.67) = around 180

For the equation: x5+7x3-30x=0 The highest exponent in the entire equation is 5 (from x5), so the equation is of degree 5.

24 - 13x + 5 = 30x + 5 - 3x is the same as 24 - 13x + 5 = 27x + 5 is the same as 29 -13x = 27x + 5 is the same as -13x -27x = 5 -29 is the same as -40x = -24 is the same as 40x = 24 is the same as 5x = 3

31x

For example ?x+20=50x then solve: 50x-20=30x 30x/x=30 then the answer is 30 you just have to dived the answer by x

9x2 + 30x + 25