Question

PLEASE I NEED HELPP; DUE IN 2 hourss pls

FIND X, i think you need to use pythagoras theroem

Answer 1

pythagoras theorem

(2x+1)²= 12²+(x-1)²

4x²+4x+1 = 144+x²-2x+1

4x²+4x+1=x²-2x+145

4x²+4x+1-x²+2x-145=0

3x²+6x-144=0

b²-4ac= 6²-4(3*-144)=36+1728=1764

Δ=1764

Δ is strictly positive, the equation 3x²+6x−144=0 admits two solutions.

(-b-√Δ)/2a = (-6-42)/6=-8

(-b+√Δ)/2a = (-6+42)/6=6

a length is not negative

→x=6