Ireally need , i got the first part, i just can't find a b and c

see explanation

Step-by-step explanation:

The standard form of a quadratic is

ax² + bx + c = 0 : a ≠ 0

Given

y = (2x + 3)² = (2x + 3)(2x + 3) ← expand factors

  = 2x(2x + 3) + 3(2x + 3)

  = 4x² + 6x + 6x + 9 ← collect like terms

  = 4x² + 12x + 9 ← in standard form, hence

0 = 4x² + 12x + 9 ← standard quadratic equation

with a = 4, b = 12 and c = 9

over the argument its not good to fight.

the correct answer would be:

220 centimeters

to get this you can use the pythagorean theorem

hope this

step-by-step explanation: