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a = 4,9;
b = - 25√3;
c = 75
Mencari akar bisa menggunakan rumus ABC:
x = [- b ± √(b² - 4ac)] / 2a
x = [ 25√3 ± √{(25√3)² - 4(4,9)(75)} ] / 2(4,9)
x = [ 25√3 ± √{1875 - 1470} ] / 9,8
x = [ 25√3 ± √{405} ] / 9,8
x = [ 25√3 ± 9√5 ] / 9,8
x₁ = [ 25√3 + 9√5 ] / 9,8
x₂ = [ 25√3 - 9√5 ] / 9,8
semoga tercapai tujuan ya...