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29.12.2019 •
Mathematics
Which factorization of 4x2 – 19x – 5 is correct?
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Ответ:
= 4x^2 - 20x + x - 5
= 4x(x - 5) +1(x - 5)
= (4x + 1)(x - 5)
Ответ:
4x² – 19x – 5
[-b + √(b²-4.a.c)]/2
x₁ = [-b + √(b²-4.a.c)]/2 and x₂ = [-b - √(b²-4.a.c)]/2
x₁ = 5 and x₂ = -1/4
ax² + bx + c = a(x-x₁)(x-x₂)
Then a(x-x₁)(x-x₂) = 4(x-5)(x+1/4) (put second term at same denominator:
Or 4(x-5)(4x+1)/4. Now simplify by 4, final
(x-5)(4x+1) = 4x² – 19x – 5
Ответ:
B-75
Step-by-step explanation:
110-35+75
To solve this problem you will have subtract B from A.