3. Find the product using the identity
(x + a) (x + b) = x2 + (a + b) x + ab.
c. 505 x 502
d. (5p - 79) (5p - 79)
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c) 505 x 502 600+5)/500+2)
-> (500)² + (5+2) 500 + 5X2
250000 + 5000 + 10.
255010
d) (56-79) (56-79) (Sp-79)² = (5p)² + (79)² - (xspx 79) 25² + 6241 - 790p
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