X=12
Hope this helps
10x-20+6x+8=180º
<span>the area of a square is the product of two of its sides
the 13 foot square = 13*13 = 13^2
for three squares= 3* 13^2
the 15 foot square = 15*15 = 15^2
for 2 squares = 2 * 15^2
Add the values together and you get A as the answer</span><span>
</span>
81 is the perfect square because 9 * 9
Answer:
x=1.816298 or x=−1.162524
Step-by-step explanation:
Step 1: Multiply both sides by x^2.
x2=x4−3x3+8x2−16
x2−(x4−3x3+8x2−16)=x4−3x3+8x2−16−(x4−3x3+8x2−16)(Subtract x^4-3x^3+8x^2-16 from both sides)
−x4+3x3−7x2+16=0
(Use quartic formula)
x=−1.162524,1.816298
Check answers. (Plug them in to make sure they work.)
x=1.816298(Works in original equation)
x=−1.162524(Works in original equation)