If 5 is a root of the equation 2x 2 – 6x – 5a = 0, then the value of a 2 – 2a is
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D=B^2-4AC
D=36+40A
R=-B+ROOTD/2A
5=6-ROOF36+40A/4
ROOT36+40A=14
36+40A=196
40A=160
A=4
2-2A=2-8=-6
D=36+40A
R=-B+ROOTD/2A
5=6-ROOF36+40A/4
ROOT36+40A=14
36+40A=196
40A=160
A=4
2-2A=2-8=-6
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