Question

+ 2 = 16" alt=" \sqrt{t + 3 } + 2 = 16" align="absmiddle" class="latex-formula">
can someone help me with these two problems?
${5x}^{2} + 8x = - 3$

Answer 1

√(t + 3) = 14 ← -2 both sides
  t + 3 = 196 ← square both sides
  t = 193  ← subtract 3 from both sides 

5x² + 8x + 3 = 0  ← put in standard form 

(5x + 3)(x + 1) = 0 ← factor

5x + 3 = 0 or x + 1 = 0 ←Zero product property

x = $- \frac{3}{5}$   or x = -1