OBLICZ DELTE proszę po kolei obliczenia bo muszę to załapać będę wdzięczna:( a) xkwadrat -7x +6 =0 b)xkwadrat -2x +1 =0 c)2xkwadrat + 3x+1=0 d)xkwadrat -2x - 3 =0 e) 1/2kwadrat - 2 =0 Proszę o rozwiązanie z góry dziękuję ;)

a) x² - 7x + 6 = 0 Δ = 49 - 24 Δ = 25 b) x² -2x + 1 = 0 Δ = 4 - 4 = 0 c) 2x² + 3x + 1 = 0 Δ = 9 - 8 = 1 d) x² -2x - 3 =0 Δ = 4 + 12 = 16 e) 0,5x² - 2 =0 Δ = 0 + 4 = 4

a) x² -7x +6 =0 a = 1 , b = -7, c = 6 Δ = b² - 4 * a * c Δ = 49 - 4 * 1 * 6 = 49 - 24 = 25 √Δ = 5 x = -b - √Δ/2*a = 7 - 5/ 2*1 = 2/2 = 1 x = -b + √Δ/2*a = 7 + 5 / 2 * 1= 12/2 =6 b)x² -2x +1 =0 a = 1 , b = -2, c =1 Δ = b² - 4 * a * c Δ = 4 - 4 * 1 * 1 = 0 x(zero) = -b/2 *a x(zero) = 2 / 2 * 1 = 2/2 = 1 c)2x² + 3x+1=0 a = 2 , b = 3, c = 1 Δ = b² - 4 * a * c Δ = 9 - 4 * 2 * 1 = 9 -8 = 1 √Δ = 1 x = -b - √Δ/2*a = -3 - 1/ 2*2 = -4/4 = -1 x = -b + √Δ/2*a = -3 + 1 / 2 * 2= -2/4 = -1/2 d)x² -2x - 3 =0 a = 1 , b = -2, c = -3 Δ = b² - 4 * a * c Δ = 4 - 4 * 1 * (-3) = 4 + 12 = 16 √Δ = 4 x = -b - √Δ/2*a = 2 -4 / 2*1 = -2/2 = -1 x = -b + √Δ/2*a = 2 + 4 / 2 *1= 6/2 = 3 e) 1/2x - 2 =0 a = 0 , b = 1/2, c = -2 Δ = b² - 4 * a * c Δ = 1/4 - 4 * 0 * -2 = 1/4 [1/4 = 0,25] √Δ = 0,5 x = -b - √Δ/2*a = -0,5 - 0,5/ 2*0 = 0 x = -b + √Δ/2*a = -0,5 + 0,5 / 2 * 0= 0