Question

solve the equation 4n2 - 2n - 90​

Answer 1

$\huge{\boxed{\boxed{\tt{\pink{★Solution:★}}}}}$

$4 {n}^{2} - 2n - 90=0 \\ 2( \ {2n}^{2} - n - 45)=0 \\ 2 {n}^{2} - 10n + 9n - 45 =0\\ 2n(n - 5) + 9(n - 5)=0 \\ (2n + 9)(n - 5)=0\\n= -9/2, n= 5$

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