Question

1. Which of the following will simplify to the
correct solutions of y = 2x2 + 5x - 7?

Answer 1

Option B

Explanation:

Given quadratic equation is,

y = 2x² + 5x - 7

By comparing this equation with y = ax² + bx + c

a = 2, b = 5 and c = -7

Solution of the polynomial (2x² + 5x - 7) can be determined by the quadratic formula,

`x=(-b\pm √(b^2-4ac))/(2a)`

Substitute the values of a, b and c.

`x=(-5\pm √(5^2-4(2)(-7)))/(2(2))`

`=(-5\pm √(25+56) )/(4)`

Therefore, Option B will be answer.