$$(-21) \times (-4)+(-6)=(-21) \times (-4)+(-21) \times (-6)$$
$\text{false}$
$$84-6=-21\left(-4\right)-21\left(-6\right)$$
$$78=-21\left(-4\right)-21\left(-6\right)$$
$$78=84+126$$
$$78=210$$
$$\text{false}$$
Show Solution
Hide Solution