问题 Factor the expression 4x(1+5x) Evaluate 4x+20x2Rewrite the expression 4x+4x×5x解题方案 4x(1+5x) 显示解题方案 Find the roots x1=−51,x2=0Alternative Form x1=−0.2,x2=0 Evaluate 4x+20x2To find the roots of the expression,set the expression equal to 0 4x+20x2=0Factor the expression 更多步骤 Evaluate 4x+20x2Rewrite the expression 4x+4x×5xFactor out 4x from the expression 4x(1+5x) 4x(1+5x)=0When the product of factors equals 0,at least one factor is 0 4x=01+5x=0Solve the equation for x x=01+5x=0Solve the equation for x 更多步骤 Evaluate 1+5x=0Move the constant to the right-hand side and change its sign 5x=0−1Removing 0 doesn't change the value,so remove it from the expression 5x=−1Divide both sides 55x=5−1Divide the numbers x=5−1Use b−a=−ba=−ba to rewrite the fraction x=−51 x=0x=−51解题方案 x1=−51,x2=0Alternative Form x1=−0.2,x2=0 显示解题方案
