Question

Doprowadź wyrażenia algebraiczne do prostszej postaci:

a) (4x+5)*-(3x-6)(3x+6)=
b) (8-4c)*-(7a-4)(7a+4)=
c) 6(8x-5)-4(2x-5)=
d) (3a+5)(2a-4)=

-Jak coś to * poza nawiasami w punkcie a i b to pierwiastki.

Answer 1

a) (4x+5)*-(3x-6)(3x+6)=

(4x+5)(4x+5)-(3x-6)(3x+6)=

16x²+20x+20x+25-(9x²+18x-18x-36)=

16x²+40x+25-9x²-18x+18x+36=

7x²+40+61

b) (8-4c)*-(7a-4)(7a+4)=

(8-4c)(8-4c)-(49a²+28a-28a-16)=

64-32c-32c+16c²-49a²-28a+28a+16=

16c²-49a²-64c+80

c) 6(8x-5)-4(2x-5)=

48x-30-8x+20=

40x-10

d) (3a+5)(2a-4)=

6a²-12a+10a-20=

6a²-2a-20