Question

1. Solve 2x2 + x - 15 < 0.​

Answer 1

Answer:

$\Huge \boxed{x<3}$

Step-by-step explanation:

$\large\textnormal{Multiply}$

$\displaystyle 2\times2=4$

$\displaystyle 4x+x-15<0$

$\large\textnormal{Add similar to elements.}$

$\displaystyle 4x+x=5x$

$\displaystyle 5x-15<0$

$\large \textnormal{Add by 15 from both sides.}$

$\displaystyle 5x-15+15<0+15$

$\displaystyle 5x<15$

$\large \textnormal{Divide by 5 from both sides.}$

$\displaystyle \frac{5x}{5}=\frac{15}{5}$

$\large\textnormal{Solve to find the answer.}$

$\displaystyle 15\div5=3$

$\large \boxed{x<3}$, which is our answer.