Question

10n−2n²
+28=0

can anyone please solve this...above..correct answer will be marked brainliest
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Answer 1

-2n² +10n +28 = 0

2n² -10n -28 = 0

2n² -14n +4n -28 = 0

2n (n-7) + 4(n-7) = 0

(n-7) (2n+4) = 0

n = 7 , -2

Or you can either do it as,

2n² -10n -28 = 0

n² -5n -14 = 0

n² -7n +2n -14 = 0

n(n-7) +2(n-7) = 0

(n-7) (n+2) = 0

n = 7 , -2