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(3m+7)=(9m^2-21m+49)=
We move all terms to the left:
(3m+7)-((9m^2-21m+49))=0
We get rid of parentheses
3m-((9m^2-21m+49))+7=0
We calculate terms in parentheses: -((9m^2-21m+49)), so:We get rid of parentheses
(9m^2-21m+49)
We get rid of parentheses
9m^2-21m+49
Back to the equation:
-(9m^2-21m+49)
-9m^2+3m+21m-49+7=0
We add all the numbers together, and all the variables
-9m^2+24m-42=0
a = -9; b = 24; c = -42;
Δ = b2-4ac
Δ = 242-4·(-9)·(-42)
Δ = -936
Delta is less than zero, so there is no solution for the equation
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