Question Simplify the expression x4−70x2 Evaluate x4−7x2×10Solution x4−70x2 Show Solution Factor the expression x2(x2−70) Evaluate x4−7x2×10Multiply the terms x4−70x2Rewrite the expression x2×x2−x2×70Solution x2(x2−70) Show Solution Find the roots x1=−70,x2=0,x3=70Alternative Form x1≈−8.3666,x2=0,x3≈8.3666 Evaluate x4−7x2×10To find the roots of the expression,set the expression equal to 0 x4−7x2×10=0Multiply the terms x4−70x2=0Factor the expression x2(x2−70)=0Separate the equation into 2 possible cases x2=0x2−70=0The only way a power can be 0 is when the base equals 0 x=0x2−70=0Solve the equation More Steps Evaluate x2−70=0Move the constant to the right-hand side and change its sign x2=0+70Removing 0 doesn't change the value,so remove it from the expression x2=70Take the root of both sides of the equation and remember to use both positive and negative roots x=±70Separate the equation into 2 possible cases x=70x=−70 x=0x=70x=−70Solution x1=−70,x2=0,x3=70Alternative Form x1≈−8.3666,x2=0,x3≈8.3666 Show Solution