arthur-watson_60bd21545a5a0
arthur-watson_60bd21545a5a0
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vou tentar te ajudar x²+12=7x x² - 7x + 12 = 0 a = 1 b = -7 c = 12 Δ = √b² - 4 . a . c Δ = √-7² - 4 . 1 . 12 Δ = √49 - 48 Δ = √1 Δ = 1 -b ± Δ ..2.a 7 ± 1 _____ ...2.1 x' = 7 + 1........8 _________= ____= 4 .........2.......…