Question

2²+5x-7=0​

Answer 1

Объяснение:

2²+5x-7=0

4+5х-7=0

5х=3

х=3/5

Answer 2

To solve the quadratic equation 2² + 5x - 7 = 0, you can use various methods such as factoring, completing the square, or using the quadratic formula. Let's use the quadratic formula, which works for any quadratic equation in the form ax² + bx + c = 0.

The quadratic formula is given by: x = (-b ± √(b² - 4ac)) / 2a

In this equation: a = 2 b = 5 c = -7

Now, plug the values into the formula and calculate the roots:

x = (-(5) ± √((5)² - 4 * 2 * (-7))) / (2 * 2) x = (-5 ± √(25 + 56)) / 4 x = (-5 ± √81) / 4 x = (-5 ± 9) / 4

Now, we have two possible solutions for x:

1. x = (-5 + 9) / 4 x = 4 / 4 x = 1

2. x = (-5 - 9) / 4 x = -14 / 4 x = -7/2

So, the solutions for the quadratic equation 2² + 5x - 7 = 0 are x = 1 and x = -7/2.