Question

- a? – 14a – 51
Factorise by splitting the middle term

Answer 1

-a² - 14a - 51

-a² - 3a + 17a - 51

-a(a + 3) +17 (a + 3)

(-a + 17)(a + 3)

Answer 2

Answer:

${a}^{2} - 14a - 51 \\ = {a}^{2} - 17a + 3a - 51 \\ = a(a - 17) + 3(a - 17) \\ = (a - 17)(a + 3) \\ = > a = + 17 \: \: \: \: \: = > a = - 3 \: (ans)$

See above!

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