Answer:
(2x - 3)(2x + 3)
Step-by-step explanation:
Given
4x² - 9
This is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
4x² = (2x)² ⇒ a = 2x
9 = 3² ⇒ b = 3, thus
4x² - 9 = (2x - 3)(2x + 3) ← in factored form
8) 36 - 12x = 48
12x = -12
X= -1
9) x = 24.5
10) 5x -15 = 45
5x = 30
X =6
11) -3x+9=45
3x= -36
X= -12
12) 14y=21
Y= 1.5
13) 2m = 8/5
M= 4/5
14) 3x = 15
X= 5
Speed 45m/s
Distance = speed × time
d = 45 × t
d= 45t
So, this is your equation for distance travelled in h time.
Answer: 
Step-by-step explanation:
A quadratic function is as following; 
Notice that it cannot be 
because if you solve; 
which eliminates the 
.
Answer:
23/100 or 23/10
Step-by-step explanation:
2.3/1
(2.3 x 10) / (1 x 10) =23/10
find lcm (lowest common multiple) for 23 and 10
1 is the lcm for 23 and 10
23/10 is a simplest fraction for the decimal point number 2.3
