Answer:
x²-2x-99
Step-by-step explanation:
(x-11)(x+9) - foil method
x times x = x squared
x times 9 = 9x
-11 times x = -11x
-11 times 9 = -99
x squared + 9x + 11x + -99
x squared-2x-99
(3a-4b)²
= 9a² - 12ab + 16b²
Answer:
Step-by-step explanation:
cos theta is 2/3 because cos means reciprocal of sec
b. One hundred and fifty (150) square feet