Factorise: 5c(4r-3t)(4r-3t)

Answer 1

Be patient as you work your way through this:

I'm going to multiply the two sets of ( ) together first using the FOIL method.

(4r-3t) (4r-3t) = 16r²-12rt-12rt+9t² and simplify that to 16r²-24rt+9t²

Now let's multiply that by 5c(16r²-24rt+9t²)

80cr²-120crt+45ct²

Hope that helps!