Answer: x=−5 or x=5
Step-by-step explanation:
−3x4+27x2+1200=0
Step 1: Factor left side of equation.
−3(x2+16)(x+5)(x−5)=0
Step 2: Set factors equal to 0.
x2+16=0 or x+5=0 or x−5=0
x=−5 or x=5
Answer:
x= 1 over 4y-2
Surface area of cube =6× l^2 (where l is the side of cube)
Therefire 6×9^2=6×81
=486in^2
