Question

Ex 3 şi 4 vă rog tare mult
dau coroana

Answer 1

3. a) (x-3)^2
b) (5x + 1)^2
c) 4(x-1)^2 - 4(x-1) +1 = [2(x-1)-1]^2
d) (x-3)^2 + 2(x-3)(y+1) + (y+1)^2
e) (a^2 + 1)^2

4. a) (5x)^2 + 2^2
b) x^2-9^2
c) (4x)^2 - 2^2
d) x^2-3
e) (5x)^2 - 2*5x*1 +1 - y^2 = (5x)^2 -10x +1 - y^2
f) 7x^2-1
g) (4x^2 -4x+1) - (x^2+6x+9)= 4x^2-4x+1-x^2-6x-9= 3x^2 -10x -8
h) 16x^2-8x+1 - (25x^2+10x+1) = 16x2-8x+1-25x2 -10x-1 = -9x^2 -18x= -9x(x+2)