I actually posted this a while ago and it got answerd by a smart person so here's what I understood
the error is that it assumes that √(x²)=x
because if x is negative, it becomes positive
that's how the 2nd line is wrong
the 2nd line is the first wrong step
it goes from 4-9/2+9/2
so it goes from 4-4.5+4.5
notice the part under the parenthsees
√((4-4.5)²)
if we evaluate 4-4.5, we get -0.5
but by squaring it we get 0.5
-0.5+4.5=4, yes
but when we square it we get
0.5+4.5=5, that is how it works
22x + 5 < 6x - 11
Subtract 6x from both sides, as well as subtracting 5 from both sides.
22x - 6x < -11 - 5
Simplify.
16x < - 16
Divide both sides by 16.
x < -1
~Hope I helped!~
D. No, because not enough is information given to prove the triangles congruent by SAS
Answer: simply, solve for it ! .
Like-if you have an equation with 2 sides , you have to flip its sign and hand on (whatever you have ) to the against side .