1/
E= (2x-3)² + (2x-3)(5-x)
(2*1-3)²+ (2*1-3)(5-1)
(2-3)² + (2-3)(4)
(-1)² (-1)(4)
1 +3
=4
2/
e =4x²-12x+9+10x-2x²-15+3x
e = 2x²+x-6
3/
E= (2x-3)²+ (2x-3)(5-x)
(2x-3)(2x-3+5-x)
(2x-3)(x+2)
4/
(2x-3)(x+2)=0
2x-3 =0 x+2 =0
2x =3 x = -2
x = 3/2
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1/
E= (2x-3)² + (2x-3)(5-x)
(2*1-3)²+ (2*1-3)(5-1)
(2-3)² + (2-3)(4)
(-1)² (-1)(4)
1 +3
=4
2/
e =4x²-12x+9+10x-2x²-15+3x
e = 2x²+x-6
3/
E= (2x-3)²+ (2x-3)(5-x)
(2x-3)(2x-3+5-x)
(2x-3)(x+2)
4/
(2x-3)(x+2)=0
2x-3 =0 x+2 =0
2x =3 x = -2
x = 3/2