Question

r2(3r + 4) + 6r(r – 2)

Answer 1

Answer:

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Step-by-step explanation:

=r2(3r+4)+6r(r-2)

Multiply 2r and 6r inside the bracket

=2r×3r+2r×4+6r×r+6r×(-2)

=5r²+8r+6r²-12r

Add the like terms

=5r²+6r²+8r-12r

=11r²-4r

Answer:11r²-4r

Hope this helps you

Answer 2

Answer:

= r2(3r+4) + 6r(r-2)

= 6r^2+8r+6r^2-12r

=12r^2-4r

=4r(3r-1)

; 4r = 0 or 3r-1 = 0

=> r = 0/4 or 3r = 1

; r = 0 or r = 1/3