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kaitlyn2030
05.05.2021 •
Mathematics
a farmer has cows,goats and pigs in the given ratio 3:4:7 if there are 49 pigs, how many cows are there
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Ответ:
x² - 3x - 10
x² = x * x
10 can be factored:
1 x 10 ⇒⇒⇒ difference between factors = 9
2 x 5 ⇒⇒⇒ difference between factors = 3 ⇒ (The correct pair)
(x-5)(x+2) = x(x+2) - 5(x+2)
= x² + 2x - 5x - 10
= x² - 3x - 10
∴ x - 5 = 0 ⇒⇒⇒ x = 5
x + 2 = 0 ⇒⇒⇒ x = -2
I have attached algebra tiles for the given equation.
bye
Step-by-step explanation: