y² + 8y + 15 = y^2 +5y+3y +15 = y(y+5) +3(y+5) =(y+5)(y+3)
y² + 8y + 15
Polynomial like : ax² + bx + c, where :
a = 1
b = 8
c = 15
Δ = b² - 4ac (discriminant)
Δ = 8² - 4(1 * 15) = 64 - 60 = 4 = 2²
x1 = (- b - √Δ) / 2a = (- 8 - 2) / (2 * 1) = - 10/2 = - 5
x2 = (- b + √Δ) / 2a = (- 8 + 2) / (2 * 1) = - 6/2 = - 3
= y² + 8y + 15
= (y + 5)(y + 3)
=y²+3y+5y+15
=y(y+3)+5(y+3)
=(y+3)(y+5)
15+8= 23 then y2
y/y +8y/y +15
(y + 3)(y + 5)
15 = 1,3,5,15
3+5 = 8
(y+3)(y+8)
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Verified answer
y² + 8y + 15 = y^2 +5y+3y +15 = y(y+5) +3(y+5) =(y+5)(y+3)
y² + 8y + 15
Polynomial like : ax² + bx + c, where :
a = 1
b = 8
c = 15
Δ = b² - 4ac (discriminant)
Δ = 8² - 4(1 * 15) = 64 - 60 = 4 = 2²
x1 = (- b - √Δ) / 2a = (- 8 - 2) / (2 * 1) = - 10/2 = - 5
x2 = (- b + √Δ) / 2a = (- 8 + 2) / (2 * 1) = - 6/2 = - 3
= y² + 8y + 15
= (y + 5)(y + 3)
y² + 8y + 15
=y²+3y+5y+15
=y(y+3)+5(y+3)
=(y+3)(y+5)
15+8= 23 then y2
y/y +8y/y +15
(y + 3)(y + 5)
(y + 3)(y + 5)
15 = 1,3,5,15
3+5 = 8
(y+3)(y+8)