
ա) (3x+2)2−x2(3x + 2)^2 — x^2(3x+2)2−x2:
(3x+2)2−x2=(3x+2−x)(3x+2+x)=(2x+2)(4x+2)(3x + 2)^2 — x^2 = (3x + 2 — x)(3x + 2
+x) = (2x + 2)(4x + 2)(3x+2)2−x2=(3x+2−x)(3x+2+x)=(2x+2)(4x+2)
բ) (4x+3)2−(x+1)2(4x + 3)^2 — (x + 1)^2(4x+3)2−(x+1)2:
(4x+3)2−(x+1)2=(4x+3−(x+1))(4x+3+(x+1))=(3x+2)(5x+4)
գ) (2x−5)2−x2(2x — 5)^2 — x^2(2x−5)2−x2:
(2x−5)2−x2=(2x−5−x)(2x−5+x)=(x−5)(3x−5)(2x — 5)^2 — x^2 = (2x — 5 — x)(2x — 5 + x) = (x — 5)(3x — 5)(2x−5)2−x2=(2x−5−x)(2x−5+x)=(x−5)(3x−5)
դ) (5x−2)2−(x−1)2(5x — 2)^2 — (x — 1)^2(5x−2)2−(x−1)2:
(5x−2)2−(x−1)2=(5x−2−(x−1))(5x−2+(x−1))=(4x−1)(6x−3)(5x — 2)^2 — (x — 1)^2 = (5x — 2 — (x — 1))(5x — 2 + (x — 1)) = (4x — 1)(6x — 3)(5x−2)2−(x−1)2=(5x−2−(x−1))(5x−2+(x−1))=(4x−1)(6x−3)
219.
ա) (3x+y)2−(2x−3y)2(3x + y)^2 — (2x — 3y)^2(3x+y)2−(2x−3y)2:
(3x+y)2−(2x−3y)2=((3x+y)−(2x−3y))((3x+y)+(2x−3y))=(x+4y)(5x−2y)(3x + y)^2 — (2x — 3y)^2 = ((3x + y) — (2x — 3y))((3x + y) + (2x — 3y)) = (x + 4y)(5x — 2y)(3x+y)2−(2x−3y)2=((3x+y)−(2x−3y))((3x+y)+(2x−3y))=(x+4y)(5x−2y)
բ) (5x−2y)2−(2x−y)2(5x — 2y)^2 — (2x — y)^2(5x−2y)2−(2x−y)2:
(5x−2y)2−(2x−y)2=((5x−2y)−(2x−y))((5x−2y)+(2x−y))=(3x−y)(7x−3y)(5x — 2y)^2 — (2x — y)^2 = ((5x — 2y) — (2x — y))((5x — 2y) + (2x — y)) = (3x — y)(7x — 3y)(5x−2y)2−(2x−y)2=((5x−2y)−(2x−y))((5x−2y)+(2x−y))=(3x−y)(7x−3y)
գ) (2×2−y)−x4(2x^2 — y) — x^4(2×2−y)−x4:
(2×2−y)−x4(2x^2 — y) — x^4(2×2−y)−x4
դ) (3×2−2y)2−4×4(3x^2 — 2y)^2 — 4x^4(3×2−2y)2−4×4:
(3×2−2y)2−(2×2)2=(3×2−2y−2×2)(3×2−2y+2×2)=(x2−2y)(5×2−2y)(3x^2 — 2y)^2 — (2x^2)^2 = (3x^2 — 2y — 2x^2)(3x^2 — 2y + 2x^2) = (x^2 — 2y)(5x^2 — 2y)(3×2−2y)2−(2×2)2=(3×2−2y−2×2)(3×2−2y+2×2)=(x2−2y)(5×2−2y)
ե) (4x+3y)2−(3x−4y)2(4x + 3y)^2 — (3x — 4y)^2(4x+3y)2−(3x−4y)2:
(4x+3y)2−(3x−4y)2=((4x+3y)−(3x−4y))((4x+3y)+(3x−4y))=(x+7y)(7x−y)(4x + 3y)^2 — (3x — 4y)^2 = ((4x + 3y) — (3x — 4y))((4x + 3y) + (3x — 4y)) = (x + 7y)(7x — y)(4x+3y)2−(3x−4y)2=((4x+3y)−(3x−4y))((4x+3y)+(3x−4y))=(x+7y)(7x−y)
զ) (2x−4y)2−(5x+y)2(2x — 4y)^2 — (5x + y)^2(2x−4y)2−(5x+y)2:
(2x−4y)2−(5x+y)2=((2x−4y)−(5x+y))((2x−4y)+(5x+y))=(−3x−5y)(7x−3y)(2x — 4y)^2 — (5x + y)^2 = ((2x — 4y) — (5x + y))((2x — 4y) + (5x + y)) = (-3x — 5y)(7x — 3y)(2x−4y)2−(5x+y)2=((2x−4y)−(5x+y))((2x−4y)+(5x+y))=(−3x−5y)(7x−3y)
է) (3x−2y)2−y4(3x — 2y)^2 — y^4(3x−2y)2−y4:
(3x−2y)2−y4(3x — 2y)^2 — y^4(3x−2y)2−y4
Անհնար է սույն ձևափոխությունը՝ կապված y^4-ից, որը բազմանիշ չէ:
ը) (4×2+3y)2−9y4(4x^2 + 3y)^2 — 9y^4(4×2+3y)2−9y4:
(4×2+3y)2−9y4=((4×2+3y)−3y2)((4×2+3y)+3y2)=(4×2+3y−3y2)(4×2+3y+3y2)(4x^2 + 3y)^2 — 9y^4 = ((4x^2 + 3y) — 3y^2)((4x^2 + 3y) + 3y^2) = (4x^2 + 3y — 3y^2)(4x^2 + 3y + 3y^2)(4×2+3y)2−9y4=((4×2+3y)−3y2)((4×2+3y)+3y2)=(4×2+3y−3y2)(4×2+3y+3y2)

