Question

a) (-2a²+5a-3)+(a²-7a+8)-(4a²-3a-1)

b) (a²-7a+8)-(4a²-3a-1)-(-20²+5a_3)

c)(4a²-3a-1)-(-20²+5a-3)

d)(-a²-7a+8)-(4a²-3a-1)

e)(5x²-3x+4)+(2x²+4x-3)

f)(5x²-3x+4)-(2x²+4x-3)

g)(2x²+4x-3)-(5x²-3x+4)​

Answer 1

Resposta:

a) (-2a²+5a-3)+(a²-7a+8)-(4a²-3a-1)

$-2a^{2} + 5a - 3 + a^{2} - 7a + 8 - 4a^{2} + 3a + 1\\- 5a^{2} + a + 6$

b) (a²-7a+8)-(4a²-3a-1)-(-20²+5a_3)

$a^{2} - 7a + 8 - 4a^{2} + 3a + 1 + 20^{2} - 5a + 3\\- 3a^{2} - 9a + 12 + 20^{2} \\- 3a^{2} - 9a + 12 + 400\\-3a^{2} - 9a + 412$

c)(4a²-3a-1)-(-20²+5a-3)

$4a^{2}-3a-1+20^{2}-5a+3\\4a^{2} - 8a + 2 + 20^{2}\\4a^{2} - 8a + 2 + 400\\4a^{2} - 8a + 402$

d)(-a²-7a+8)-(4a²-3a-1)

$-a^{2}-7a+8-4a^{2}+3a+1\\-5a^{2} - 4a + 9$

e)(5x²-3x+4)+(2x²+4x-3)

$5x^{2}-3x+4+2x^{2}+4x-3\\7x^{2} + x + 1$

f)(5x²-3x+4)-(2x²+4x-3)

$5x^{2}-3x+4-2x^{2}-4x+3\\3x^{2}-7x+7$

g)(2x²+4x-3)-(5x²-3x+4)​

$2x^{2}+4x-3-5x^{2}+3x-4\\-3x^{2} +7x - 7$