Put in descending order if needed Factor completely If prime

Put in descending order if needed! Factor completely! If prime, then write prime!

#1 2ab-3b^2-3b+2a

#2 4x^2+40

#3 4x^3+8x^2+20x

#4 15x+15+4x^2

#1 2ab-3b^2-3b+2a

Factorise by taking out common terms:

(2ab-3b^2) (-3b+2a)

b( 2a -3b) +1(2a -3b)

(1+b)( 2a -3b)

2. 4x^2 +40 = 2(x^2 +10)

cannot be factored further

3. 4x^3+8x^2+20x

4x( x^2 +2x +5)

cannot be factored further

4. 15x+15+4x^2

Rearrange in desecnding order:

4x^2 +15x +15

cannot be factored further, prime