Math, asked by karishmad, 1 year ago

find the value of k for which the equation x^k(k+1)+2x+7=0

mysticd: check the problem again something wrong

karishmad: nothing wrong

Answers

Answered by vickeydey

consider the power of x as 2. so it is a quadratic equation. then putting 2 in the power of x we get, k(k+1)=2.so k²+(2-1)k-2=0.
or,k=1or -2.

mysticd: why we take it as quadratic equation

vickeydey: because an equation can only be a quadratic equation when in the equation the power of x is 2 which can be only possible when the equation is equal to 0

vickeydey: welcome

mysticd: i think ur solution is wrong

vickeydey: ok then think

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