Question

plz solve the equation

in equation the last variable is +2bc-b^2​

Answer 1

Answer:

sum of ist eqn=(9b^2-3c)+(2b^2+bc-2c^2)=11b^2+bc-5c^2

sum of iind eqn=b^2-c^2

hence,subtract ist from iind

b^2-c^2-11b^2-bc+5c^2=12b^2-6c^2+bc