b ) - 2x ^ 2 + 5x + 3 = 0 ; - Dicamon

Question

b ) - 2x ^ 2 + 5x + 3 = 0 ;

Answer

b - 2x ^ 2 + 5x + 3 = 0; 2x ^ 2 - 5x + 3 = 0; 2x(x - 3) + (x - 3) = 0; 2x + 1 = 0; x - 3 = 0 x x = - 1/2 Vay

Answer

- 2x ^ 2 + 5x + 3 = - 2x ^ 2 + 6x - x + 3 = 0; 2x(x + 3) + (- x + 3) + 0; 7(-x+3)(2x+1)=0 int 1-x+3=0 ^ x-3; x = - 1 2

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