Question

please solve it in notebook step by step . And according to my book the correct answer is : 17m^2 + 8pm - 14m^2​

Answer 1

Answer:

17m^2+13n^2+2

Step-by-step explanation:

2P+Q+3R

=2(2m^2+5n^2-6)+m^2-6n^2+8+3(3n^2+4m^2+2)

=4m^2+10n^2-12+m^2-6n^2+8+9n^2+12m^2+6

=4m^2+m^2+12m^2+10n^2-6n^2+9n^2-12+8+6

=17m^2+13n^2+2

Answer 2

Answer:

Your answer is wrong, the right answer is

17m^2+13n^2+2.

Step-by-step explanation:

so,2P=4m^2+10n^2-12

and,3R=9n^2+12m^2+6

so,4m^2+10n^2-12+m^2-6n^2+8+9n^2+12m^2+6=

17m^2+13n^2+2.