Answer:
3x^2+11x-20
Step-by-step explanation:
step 1 3x(x+5)-4(x+5)
step 2 3x(x+5)-4(x+5)= 3x^2+15-4(x+5)
step 3 3x^2+15x-4x+20

+ 15 = 64 Subtract 15 from both sides
<span>

= 49 Find the square root of both sides to cancel out the </span>

x + 5 = 7 Subtract 5 from both sides
x = 2<span>
</span>
Ok so area=162
since the triangles sides were cut out of a square, base=height
area=1/2bh=162
b=h
area=1/2b^2=162
times 2 both sides
b^2=324
sqrt both sides
b=18=h
the legnth of one side is 18cm
see diagram
another way, is total aera of square=areas of both triangles=162+162=324
remember area of square=side^2 so
324=side^2
sqrt both sides
18=side
answer is 18cm
Answer:
_
just did the test and got it right its /x + 2
Step-by-step explanation:
just did the test i cant make the simble though but the right answer is the one where the line is only above the x oh wait actually i see your questions know my delete key broke soooo its the 2nd option