Question

13) 2n²+n-45 factorise it​

Answer 1

Answer:

2n² + n - 45

2n² 10n - 9n - 45

2n( n - 5 ) -9( n - 5)

( n - 5)(2n - 9)

n - 5 = 0 ,. 2n - 9 =0

n = 5 ,. n = 9/2

Answer 2

Answer:

${2n}^{2} + n - 45 \\ {2n}^{2} + 10n - 9n - 45 \\ 2n(n + 5) - 9(n + 5) \\ (n + 5)(2n - 9)$

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