factoring by grouping how do i solve it 8r^3-64^2+r-8
Squaring a number is the same as multiplying the number by itself (64⋅64). In this case, 64 squared is 4096.8r^3−4096+r−8Subtract 8 from −4096 to get −4104.8r^3−4104+rFactor the polynomial using the rational roots theorem.(r−8)(8r^2+64r+513)
