Study guides

☆☆

Q: 4x2 - 2x - 5 equals 0?

Write your answer...

Submit

Related questions

-4x2 + 6x + 40 = 0 ∴ -2x2 + 3x + 20 = 0 ∴ -2x2 - 8x + 5x + 20 = 0 ∴ -2x(x + 4) + 5(x + 4) = 0 ∴ (5 - 2x)(x + 4) = 0 ∴ x ∈ {5/2, -4}

4x2 - 12x + 9 = 5; whence, 2x - 3 = ±√5, and 2x = 3 ±√5. Therefore, x = ½ (3 ±√5).

x2+8x = -3x2+5 4x2+8x-5 = 0 (2x+5)(2x-1) = 0 x = -5/2 or x = 1/2

No.

4x2 + 12x + 5 = 4x2 + 2x + 10x + 5 = 2x(2x+1) + 5(2x+1) = (2x+1)(2x+5)

4x2 + 12x + 5 = (2x + 1)(2x + 5).

(2x + 5)(2x - 5)

(2x - 5)(2x + 5)

If: 10x2-64 = 36+6x2 Then: 4x2-100 = 0 And: (2x-10)(2x+10) = 0 So: x = 5 or x = -5

(2x - 5)(2x + 1)

x2-5-4x2+3x = 0 -3x2+3x-5 = 0 or as 3x2-3x+5 = 0

(2x - 5)(2x - 5) or (2x - 5) squared

(2x - 5)(2x - 5) or (2x - 5)2

(2x - 5)(2x - 5)

(2x - 1)(2x + 5)

(2x+5)(2x+5)

The first equality is: x2 - 5 = -4x2 which gives 5x2 - 5 = 0 which is equivalent to x2 - 5 = 0 The second equality is: -4x2 = 3x which gives 4x2 + 3x = 0 The two results are inconsistent.

4x2+2x-20 2x2+x-10 2x2+5x-4x-10 x(2x+5)-2(2x+5) (x-2)(2x+5)

x = 0 right 2x + 5 = 5 which makes 5 = 5 +2x subtract 5 from each side -5 -5 ---------- 0=0 + 2x 0= 2x substitue x 0 = 2 X 0 solve

(2x - 5)(2x + 3)

(2x + 3)(2x - 5)

The x intercept is where y = 0 y = 2x +5 = 0 2x + 5 = 0 2x = -5 x = -5/2 = -2.5

The equation y = 4x^2 + 5 is a parabola

4x2-8x-5 (2x+1)(2x-5)

(2x - 1)(2x + 5)