Answer:
the answer is 18 cm
Step-by-step explanation:
Answer: 2x
2
+5x−3
Step-by-step explanation:
2x
2
−x+6x−3
2x
2
+(−x+6x)−3
I think its 384 because if you multiply the two numbers underneath then you get 384 which is how they got all the other numbers
x² + 7x - 4 = 0
a = 1, b = 7, c = -4
x = [-b +/- √(b² - 4ac)]/2a
= [-7 +/- √(49 + 4)]/2
= (-7 +/- √53)/2
It is the same as commutative, just flipping the position of the numbers. For multiplication, it is the same. 3x2=2x3. But with division, you are dividing the second number from the first, so it matters what number is first and can affect it heavily.
