1.

Find zero of the polynomial 5x2+12x+7​

Answer»

\large\bf\blue{Answer:-}

5 {x}^{2}  + 12x + 7 = 0 \\ 5 {x}^{2} + 5x + 7x + 7 = 0 \\ 5x(x + 1) + 7(x + 1) = 0 \\ (x + 1)(5x + 7) = 0 \\ x + 1 = 0 \:  \: or \:  \: 5x + 7 = 0 \\ x =  - 1 \:  \: or \:  \:  x =  -  \frac{7}{5}



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