Verified answer

a) x² - 121 = x² - 11² = (x + 11)*(x - 11)

b) 81 - q² = 9² - q² = (9 + q)*(9 - q)

c) 4z² - 25 = 4z² - 5² = (2z + 5)*(2z - 5)

d) 5x + 5z = 5*(x + z)

e) a*(x - 2) + b*(x - 2) = (x - 2)*(a + b)

f) ax² + bx + cx = x*(ax + b + c)

g) x + bx + cz + dz = x*(b + 1) + z*(c + d)

pronto

a) (x+11).(x-11)

b) (9+q).(9-q)

c) (2z+5).(2z-5)

d) 5(x+z)

e) (a+b).(x-2)

f) x(ax+b+c)

g) x(1+b)+z(c+d)