1.

2x²+7x+9x-5 please factorise​

Answer»

ANSWER:

x=8.3 or -0.3

Step-by-step explanation:

2x²+16x-5

x=(16±√(16²-4*2*-5))/2*2

x=(16±√(256+40))/4

x=(16±√296)/4

⇒

x=(166+17.205)/4

x=33.205/4

x=8.3

OR

x=(116-17.205)/4

x= -1.205/4

x= -0.3


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