Réponse :
Bonsoir
programme a
avec 4
4
4+3=7
7²=49
49-4²=49-16=33
programme B
-2×4=-8
-8+16=8
2/ a B=-2x+16
b A=(x+3)²-x²=x²+6x+9-x²=6x+9
3/ -2x+16=0
-2x=-16
x=-16/-2=8
4/
-2x+16=6x+9
-2x-6x=9-16
-8x=-7
x=7/8
vérifis
-2×7/8+16=-14/8+16=-14/8+128/8=114/8=57/4
6×7/8+9=42/8+72/8=114/8=57/4
Explications étape par étape :
Bonsoir,
1)
PA
7
49
49-16= 33
PB
-8
+8
2)
PB:
x
-2x
-2x +16
x+3
x² +6x +9
x²-x²+ 6x+9 =6x+9
3)
-2x +16 =
-2x = -16
x = -16/-2 = 8
4)
-2x +16 = 6x+9
16-9 = 6x+2x
7= 8x
x = 7/8
Copyright © 2024 ELIBRARY.TIPS - All rights reserved.
Lista de comentários
Réponse :
Bonsoir
programme a
avec 4
4
4+3=7
7²=49
49-4²=49-16=33
programme B
-2×4=-8
-8+16=8
2/ a B=-2x+16
b A=(x+3)²-x²=x²+6x+9-x²=6x+9
3/ -2x+16=0
-2x=-16
x=-16/-2=8
4/
-2x+16=6x+9
-2x-6x=9-16
-8x=-7
x=7/8
vérifis
-2×7/8+16=-14/8+16=-14/8+128/8=114/8=57/4
6×7/8+9=42/8+72/8=114/8=57/4
Explications étape par étape :
Bonsoir,
1)
PA
4
7
49
49-16= 33
PB
4
-8
+8
2)
PB:
x
-2x
-2x +16
PA
x
x+3
x² +6x +9
x²-x²+ 6x+9 =6x+9
3)
-2x +16 =
-2x = -16
x = -16/-2 = 8
4)
-2x +16 = 6x+9
16-9 = 6x+2x
7= 8x
x = 7/8