Question Simplify the expression u4−207 Evaluate u4×1−7−200Any expression multiplied by 1 remains the same u4−7−200Solution u4−207 Show Solution Find the roots u1=−4207,u2=4207Alternative Form u1≈−3.793085,u2≈3.793085 Evaluate u4×1−7−200To find the roots of the expression,set the expression equal to 0 u4×1−7−200=0Any expression multiplied by 1 remains the same u4−7−200=0Subtract the numbers u4−207=0Move the constant to the right-hand side and change its sign u4=0+207Removing 0 doesn't change the value,so remove it from the expression u4=207Take the root of both sides of the equation and remember to use both positive and negative roots u=±4207Separate the equation into 2 possible cases u=4207u=−4207Solution u1=−4207,u2=4207Alternative Form u1≈−3.793085,u2≈3.793085 Show Solution