He made a mistake in step #2. It seemed to be a trivial mistake because it involved signs, but it still had a great impact. Since step#2, his solution was already wrong.
Instead of
(-1)²-4(2)(-6) = 1 + 48 = 49
What he did is
(-1)²-4(2)(-6) = -1 + 48 = 47
The surface area is <span>153.86
</span>
Answer:
correct
Step-by-step explanation:
The value of x is 12 or 32
Answer:
20x - 6
Step-by-step explanation:
You just multiply 2 by 10x and by -3
