1)Bentuk sederhana dari (3y+5)²-(y-7)² adalah A*8y²+8y+74 B*8y²+16y+74 C*8y²+22y-24 D*8y²+44y-24 2)hasil dari(2³:½)²/6X 2½ A*256/15 B*144/15 C*16/15 D*15/16 3)j

1. (3y+5)^2 -(y-7)^2
= 9y^2+30y+25 -y^2+14y-49
= 8y^2+44y-24 (D)

2. (2^3/1/2)^2 / 6 × 1
= 2^8 / 6
= 128/3 pernyataan nomor 2 tidak jelas!!

3. 6p+3q-2r
= 6×2/3 + 3 × 3/4 - 2 × -1/8
= 12/3 + 9/4 + 2/8
= 13/2

(1)
(3y+5)^2 - (y-7)^2
= 9y^2 + 30y + 25 - (y^2 - 14y + 49)
= 9y^2 + 30y + 25 - y^2 + 14y - 49
= 8y^2 + 44y - 24 (D)
(2)
(2^3 :1/2)^2 /(6×2 1/2)
(8 : 1/2)^2/(6 × 5/2)
16^2/(30/2)
256/15 (A)
(3)
6p + 3q - 2r
= 6(1 2/3) + 3(3/4) - 2(-1/8)
= 6(5/3) + 9/4 - (-2/8)
= 30/3 + 9/4 + 2/8
= 10 + 2 1/4 + 1/4
= (10 + 2) + (1/4 + 1/4)
= 12 + 2/4
= 12 2/4
= 12 1/2(....)