Answer:
8. a = 30
9. a = 3.46
General Formula:
a = square root c^2 - b^2
Answer:
27/100 because if u write the decimal out in word form it's 27 hundredths and its the same thing if u write 27/100 in word form
Step 1:
x² + 4x = 192
Step 2:
Take x common:
x ( x + 4) = 192
Length is x and width is x+4
Step 3:
x² + 4x - 192 = 0
Step 4:
x² + 16x - 12x - 192 = 0
x(x+16) - 12(x+16) = 0
(x-12)(x+16) = 0
⇒ x=12, x=-16
Because the length can't be -16, the length is 12.
Since there is a 2 at the start, we actually multiply -5 by 2, meaning that it needs to multiply to (-5*2)=-10 and add up to -3. Since -5 and 2 fit the bill, we get (x+5)(x-2)=0 (as -5+5 and 2-2=0)
