Question

find the value of a if the value of 2x square +3x minus a is equal to 6 when x= minus 2

Answer 1

Substituting a=-2;

$2 \times {-2}^{2} + 3 \times -2 - a = 6 \\ = > 2 \times 4 - 6 - a = 6 \\ = > 8 - a = 6 + 6 \\ = > a = -4$

Your answer is -4

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Answer 2

Answer:4

Step-by-step explanation:

f(x) =2x²-3x+a

f(-2) =2(2)²-3(2)+a = 6

=8-6+a =6

=2+a=6

=a =4