Question

Wykonaj działania .

a)

( x + 3 ) ( x - 3 ) - ( x + 4) do kwadratu + ( 5x-1 ) do kwadratu .

b)

( 3x + 4) do kwadratu+ (2x- 1 ) do kwadratu

Answer 1

a)

(x+3)(x-3)-(x+4)²+(5x-1)²=

x²-3x+3x-9-(x²+8x+16)+5x²-10x+1=

x²-9-x²-8x-16+25x²-10x+1=

25x²-18x-24

b)

(3x+4)²+(2x-1)²=

9x²+24x+16+4x²-4x+1=

13x²+20x+17