Question

Bisa jawab kan no 5 cuma kelas 7. 2 soal aja yang di lingkari ​

Answer 1

Penjelasan dengan langkah-langkah:

c.)

= x(y + z) - yz

= (-4)(9 + -1) - 9(-1)

= -4(8) - (-9)

= -32 + 9

= -23

f.)

= (3x - 2y + 3z)(x + 2y)

= (3(-4) - 2(9) + 3(-1))(-4 + 2(9))

= (-12 - 18 + (-3))(-4 + 18)

= (-33)(14)

= -462

Answer 2

Penjelasan dengan langkah-langkah:

x = - 4, y = 9, z = - 1

c).

x ( y + z ) - yz

= - 4 ( 9 - 1 ) + 9

= - 4 × 8 + 9

= - 32 + 9

= - 23

f).

( 3x - 2y + 3z )( x + 2y )

= { 3 × ( - 4 ) - 2 × 9 + 3 × ( - 1 )}( - 4 + 2 × 9 )

= ( - 12 - 18 - 3 ) × 14

= - 33 × 14

= - 462