Answer:

Step-by-step explanation:




Answer:
<u>LENGTH OF AC IS 6</u>
Step-by-step explanation:
Given :
<em>the side AC = x ;</em>
we need to find x;
<em>since ∠A = ∠C , It's an isosceles triangle . i.e ,</em>
<em>the sides opposite to the angles ( AB and CB ) are also equal.</em>
thus ,
side
AB = x+4 ;
CB = 3x-8 ;
thus AB = CB or ,
x+4 = 3x-8 ,
2x = 12 ,
x = 6 ;
<u>therefore the side AC is 6.</u>
Answer:

Step-by-step explanation:
We are given:

Factor:

Difference of Two Squares:

Zero Product Property:

Solve:

Take the square root. Since we are taking an even-root, it requires plus/minus:

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