question 1 :
a.
= 2x - 3) ²
= (2x) ² - 2 x 2X x 3 + 3 ²
= 4x ² - 12X + 9
b.
= (4x + 9) ² - 12X
= 16X ²+72X + 81 - 12X
= 16X ² + 60x + 81
C.
= (3X -1) (2X - 7)
= 3X x 2X + 3X x7 - 2X -7
= 6X ² + 21X - 2X -7
= 6X ² + 19X -7
d.
= -2(X+3) (1-X)
= (-2X -6) (1-x)
= -2X + 2X ² - 6 +6X
= 4X + 2X ² - 6
= 2X ² + 4X -6
