Question

a) (8x² – 2x + 1) + (3x² – 8) =

b) (2x² + 3x³ + 5x – 1) + (x² + 1 – 3x) =

c) (7x^4 – 5x^5 + 4x² –7) + (x³ – 3x² – 5 + x) + (–3x³ + 5 – 8x + 2x³ ) =

d) (–5z + 2y) – (2z – 5y – 7x –1) + (–3z – 4y – 9x) =

e) (xy –3x³ – y² + xy) + (3xy + 5x³ ) + (3xy – y²– 5x³ ) =

f)

g)

h)(a^2 - 3ab + b^2) + (-5ab + a^2 -b^2) +(8ab - b^2 -2a^2)

g)

por favor no entiendo y son para hoy​

Answer 1

a)

$(8x^2-2x+1)+(3x^2-8)\\=8x^2-2x+1+3x^2-8\\=8x^2+3x^2-2x+1-8\\=11x^2-2x+1-8\\=11x^2-2x-7$

b)

$(2x^2+3x^3+5x-1)+(x^2+1-3x)\\=2x^2+3x^3+5x-1+x^2+1-3x\\=3x^3+2x^2+x^2+5x-3x-1+1\\=3x^3+3x^2+5x-3x-1+1\\=3x^3+3x^2+2x-1+1\\=3x^3+3x^2+2x$

c)

$(7x^4-5x^5+4x^2-7)+(x^3-3x^2-5+x)+(-3x^3+5-8x+2x^3)\\=7x^4-5x^5+4x^2-7+x^3-3x^2-5+x-3x^3+5-8x+2x^3\\=-5x^5+7x^4+x^3-3x^3+2x^3+4x^2-3x^2+x-8x-7-5+5\\=-5x^5+7x^4+x^3-3x^3+2x^3+x^2+x-8x-7-5+5\\=-5x^5+7x^4+x^2+x-8x-7-5+5\\=-5x^5+7x^4+x^2-7x-7-5+5\\=-5x^5+7x^4+x^2-7x-7$

d)

$(-5z+2y)-(2z-5y-7x-1)+(-3z-4y-9x)\\=-5z+2y-(2z-5y-7x-1)-3z-4y-9x$

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$-(2z-5y-7x-1)\\=-(2z)-(-5y)-(-7x)-(-1)\\=-2z+5y+7x+1$

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$=-5z+2y-2z+5y+7x+1-3z-4y-9x\\=-5z-2z-3z+2y+5y-4y+7x-9x+1\\=-10z+2y+5y-4y+7x-9x+1\\=-10z+3y+7x-9x+1\\=-10z+3y-2x+1$

h)

$(a^2-3ab+b^2)+(-5ab+a^2-b^2)+(8ab-b^2-2a^2)\\=a^2-3ab+b^2-5ab+a^2-b^2+8ab-b^2-2a^2\\=a^2+a^2-2a^2-3ab-5ab+8ab+b^2-b^2-b^2\\=-3ab-5ab+8ab+b^2-b^2-b^2\\=b^2-b^2-b^2\\=-b^2$

Answer 2

Respuesta:

está bien jajajajaja++++++