Question

x²+3x-54=0
please solve this problem...
step by step..
(not by trial and error method)
please help me with this....
will mark the first and correct one as brainliest!​

Answer 1

Answer:

x+x+3x=0+54

5x=54

x=54/5

x=10.8

Answer 2

Step-by-step explanation:

${x}^{2} - 3x - 54 = 0 \\ \bold\blue{By \: splitting \: middle \: term,} \\ \implies {x}^{2} - 9x + 6x - 54 \\ \implies x(x - 9) + 6(x - 9) = 0 \\ \implies (x - 9)(x + 6) = 0 \\ Hence, \\ \implies \: x - 9 = 0 \\ \implies x = 9 \\And, x + 6 = 0 \\ \implies x = - 6 \\ \bold{\pink{\boxed{x = 9,-6}}}$