bjr
f(x) = -2x + 3 => a = -2
f(0) = -2*0+3 = 3
f(-1) = -2*(-1) + 3 = 1 => A
-2x+3= 4 => x = -1/2
b = 3 => E (0;3)
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bjr
f(x) = -2x + 3 => a = -2
f(0) = -2*0+3 = 3
f(-1) = -2*(-1) + 3 = 1 => A
-2x+3= 4 => x = -1/2
b = 3 => E (0;3)