Take a look at the right triangle. The vertical leg has length 12 cm because the square is 12 cm on a side.
According to the Pyth. Thm., x^2 + (12 cm)^2 = (20 cm)^2. Then:
x^2 = 400 cm^2 - 144 cm^2, or x^2 = 56
Then the unknown side length, x, is +√56 = +7√8 = +14√2.
X2-7x+12=0
So (3*4=12 and3+4=7 / the bigger number takes the 7 sign (-/+) )
So (x-4=0)(x-3=0)
X=4. X=3
Note when the last number sign is + they both take the bigger number sign and when it’s - they are different
you would factor using the perfect square method to get
(3m+5n)^2
Answer:
(4 - 5y)(2 + 3x)
Step-by-step explanation:
Given
8 - 10y + 12x - 15xy ( factor the first/second and third/fourth terms )
= 2(4 - 5y) + 3x(4 - 5y) ← factor out (4 - 5y) from each term
= (4 - 5y)(2 + 3x) ← in factored form
