Răspuns:
Explicație pas cu pas:
1
a)(x+4)²=x²+8x+16
b)(y+3)²=y²+6y+9
c)(2x+1)²=4x²+4x+1
d)(3y+2)²=9y²+12y+4
e)(x+2y)²=x²+4xy+4y²
f)(2a+5b)²=4a²+20ab+25b²
g)(b+3c)²=b²+6bc+9c²
h)(3m+n)²=9m²+6mn+n²
i)(4x+z)²=16x²+8xz+z²
j)(6x+5a)²=36x²+60ax+25a²
2.
a)(x-2)²=x²-4x+4
b)(a-1)²=a²-2a+1
c)(4-b)²=16-8b+b²
d)(5-2c)²=25-20c+4c²
e)(2a-b)²=4a²-8ab+b²
f)(x-4y)²=x²-8xy+16y²
g)(5a-6m)²=25a²-60am+36m²
h)(2z-10t)²=4z²-40zt+100t²
i)(11x-3y)²=121x²-66xy+9y²
j)(4x-7b)²=16x²-56bx+49b²
3
a)(x-2)(x+2)=x²-4
b)(a+3)(a-3)=a²-9
c)(5+x)(5-x)=25-x²
d)(4a-2c)(4a+2c)=16a²-4c²
e)(2x+1)(2x-1)=4x²-1
f)(2y-5x)(2y+5x)=4y²-25x²
g)(m+3n)(m-3n)=m²-9n²
h)(t-2z)(t+2z)=t²-4z²
i)(12a-x)(12a+x)=144a²-x²
