5x²+11x+2=0 ???????????????????????

Question

5x²+11x+2=0 ???????????????????????

Answer 1

5x^2+11x+2=(5x+1)(x+2)=0
x=-1/5
x=-2

Answer 2

5x² + 11x + 2 = 0
D = 121 - 4×5×2 = 121 - 40 = 81 = 9²
x1 = ( - 11 + 9) / 10 = - 0,2
x2 = ( - 11 - 9) / 10 = - 2

Comments

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