Answer:
Step-by-step explanation:
a² - b² = (a +b)(a - b)
9x² - 4 = 3²x² - 2²
= (3x)² - 2² {a = 3x; b = 2}
= (3x + 2)(3x - 2)
9.33
12.44=311/25
(3/4)×(311/25)=(3×311/4×25)=933/100=9.33
m = 160
p = 90
w = 10
z = 80
y = 10
