Question

2x²-2x-5=0

solve it using Δ=b²-4ac

Answer 1

44

Explanation:

2x² - 2x - 5 = 0 is written in standard form ax^2 + bx + c = 0.

By looking at the formula, we can see that;

a = 2

b = -2

c = -5

Now, we can substitute these variables into the equation we are given and solve.

= b² - 4ac

= -2^2 - 4(2)(-5)

= 4 - 4(-10)

= 4 - (-40)

= 4 + 40

= 44

Best of Luck!