Question

giving brainliest :D
show steps in a simple way (not to long of an example ty :))

Answer 1

Answer:

$\boxed{8x+6 \: units= base}$

Step-by-step explanation:

Altitude = 3x

Area = 12x² + 9x

We know that

Area of right triangle = ½ × base × altitude

Then,

12x² + 9x = ½ × 3x × base

$12x ^ { 2 } +9x= \frac{ 3x }{ 2 } \times \: base$

$\frac{6x\left(4x+3\right)}{3x} = \frac{3x\times \: base}{3x}$

$\frac{6x\left(4x+3\right)}{3x} = base$

$\underline{\underline{8x+6 \: units= base}}$

________

Hope it helps ⚜