Question

ca. Clasa
9. Descompuneți, folosind formula diferenţei de pătrate:
A. a) (x + 1)2 -9;
b) (x + 2)2 - 25;
d) (x - 5)2 - 16;
e) (y-2) – 64;
g) (2x + 1)2 – 9;
h) (3x – 4)2 – 1;
j) (4x + 1)2 – 36;
k) 25 – (2x + 3)?;
B. a) 4(a + 1)2 -9;
b) 25(2x + 1)2 – 16;
d) 9x2 - (3x - 2)2;
e) 16(x + 2)2 – 25;
g) 25x2 - (2x + 1)2; h) 25(3x + 1)2 - 4x?;​

Answer 1

Răspuns:

A.a. (x+1+3)(x+1-3)

b.(x+2+5)(x+2-5)

d. (x-5+6)(x-5-6)

e.(y-2+8)(y-2-8)

g. (2x+1+1)(2x+1-1)

h. (3x-4+1)(3x-4-1)

j. (4x+1+6)(4x+1-6)

k. (5+2x+3)(5-2x-3)

B.a. (2a+2+3)(2a+2-3)

b. (10x+5+4)(10x+5-4)

d. (3x+3x-2)(3x-3x+2)

e.(4x+8+5)(4x+8-5)

g.(5x+2x+1)(5x-2x-1)

h. (15x+5+2x)(15x-5-2x)