Sagot :
1)
A = 3(5x + 7)
=15x+21
B = 5(2x - 6)
=10x-30
C = (3x - 4)(5x - 7)
=15x2-21x-20x+28
=15x2-41x+28
N = (4 - x)2
=(4)2-2×4×x+x2
=16-8x+x2
2)
D = 3x + 3y
=3(x+y)
E = -35a + 45b
=5(-7a+9b)
F = 6x2 + 24xy
= 6x(x+4y)
G = 5z3 - 5z
=5z(z2-1)
1)
A = 3(5x + 7)
=15x+21
B = 5(2x - 6)
=10x-30
C = (3x - 4)(5x - 7)
=15x2-21x-20x+28
=15x2-41x+28
N = (4 - x)2
=(4)2-2×4×x+x2
=16-8x+x2
2)
D = 3x + 3y
=3(x+y)
E = -35a + 45b
=5(-7a+9b)
F = 6x2 + 24xy
= 6x(x+4y)
G = 5z3 - 5z
=5z(z2-1)