Find the value of 'a' if the value of 2x2 + x-a equals 6, when x = -1
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Step-by-step explanation:
2x²+x-a=6
if x= -1
➡️put the value of x in place of the equation
➡️2(-1)²+(-1) -a= 6
➡️2(1) -1 -a=6
➡️2-1-a= 6
➡️1-a=6
➡️take 1 to RHS
➡️-a=5
➡️take - sign to RHS
➡️a= -5
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