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Sagot :
(y + 7)^2 = (y + 7)(y + 7)
Multiply all the terms in the first parenthesis to all the terms in the 2nd parenthesis:
y * y = y^2
y * 7 = 7y
7 * y = 7y
7 * 7 = 49
So we have:
y^2 + 7y + 7y + 49
Combine like terms:
y^2 + 14y + 49
Multiply all the terms in the first parenthesis to all the terms in the 2nd parenthesis:
y * y = y^2
y * 7 = 7y
7 * y = 7y
7 * 7 = 49
So we have:
y^2 + 7y + 7y + 49
Combine like terms:
y^2 + 14y + 49
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