Answer:
Step-by-step explanation:
(a + b)² =a² + 2ab + b²
(a -b)² = a² - 2ab + b²
1) y = (x -1)²
y= x² - 2*x*1 + 1
y = x² - 2x + 1
Ans: C
2)y = (x +4)² + 5
y = x² +2*x*4 + 4² + 5
= x² + 8x + 16 + 5
y = x² + 8x + 21
C
3) y = -(x + 9)²- 10
y = - [x² + 18x + 81] - 10
= -x² - 18x - 81 - 10
y =-x² - 18x - 91
B
4) y = 3(x + 2)² - 18
y =3 [x² + 4x + 4] - 18
y = 3x² + 12x + 12 - 18
y =3x² + 12x - 6
A
5) y = -2(x + 1)² - 16
= -2[x² + 2x + 1] -16
= -2x² - 4x - 2 - 16
y = -2x² - 4x - 18
A
6) y = 5(x + 5)²
=5[x²+ 10x + 25]
y = 5x² +50x + 125
A
7)y = (1/2)(x + 8)² - 8
y = (1/2) (x² + 16x + 64) - 8
A
8) y = (x + 3/2)² + 3/4
C
9) y = 2[x² + 16x + 64] - 5x
y = 2x² + 32x + 64 - 5x
y =2x² + 27x + 6
Greetings! We can create an
equation that can be used to solve problems of this kind:
Let x represent the number.
Solve for x.
Divide both sides by
Reduce the fraction to lowest terms or a decimal
The Answer Is:
70% of
is equal to 90.
Hope this helps!
-Benjamin
15-x squared. this is because x squared is less then 15 so you would subtract it from 15.
Answer:
Step-by-step explanation: 5 - 1 = 4
Answer:
Yes
Step-by-step explanation:
If the largest number squared is equal to the sum of the squares of the other 2 numbers, then Pythagorean triple
largest number = 7.5 and 7.5² = 56.25
2.1² + 7.2² = 4.41 + 51.84 = 56.26
Thus 2.1, 7.2 and 7.5 create a Pythagorean triple