bonjour
A = 5 x ( 6 x - 3 )
= 5 x * 6 x + 5 x * - 3
= 30 x² - 15 x
B = ( 8 x - 1 ) ( 4 x - 7 )
= 32 x² - 56 x - 4 x + 7
= 32 x² - 60 x + 7
C = - 9 x ( 11 x - 5 )
= - 99 x² + 45 x
d = ( - 3 x + 2 ) ( 10 - 5 x)
= - 30 x + 15x² + 20 - 10 x
= 15 x² - 40 x + 20
continue
E=(8-7X)(4+2X)
=(8×4)+(8×2X)-(7X×4)-(7X×2X)
=32+16X-28X-14X^2
=32-12X-14X^2
F=(10X-8)(3X-3)
=(10X×3X)-(10X×3)-(8×3X)+(8×3)
=30X^2-30X-24X+24
=30X^2-54X+24
G=(7X-4)(-5X)
=-(5X×7X)+(5X×4)
=-35X^2+20X
H=-7X(-11X-7)
=(7X×11X)+(7X×7)
=77X^2+49X
Explication:Appliquer la distributivité et réduire si possible.
Voilà je crois tu as tout compris alors ,continue maintenant ☺
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bonjour
A = 5 x ( 6 x - 3 )
= 5 x * 6 x + 5 x * - 3
= 30 x² - 15 x
B = ( 8 x - 1 ) ( 4 x - 7 )
= 32 x² - 56 x - 4 x + 7
= 32 x² - 60 x + 7
C = - 9 x ( 11 x - 5 )
= - 99 x² + 45 x
d = ( - 3 x + 2 ) ( 10 - 5 x)
= - 30 x + 15x² + 20 - 10 x
= 15 x² - 40 x + 20
continue
E=(8-7X)(4+2X)
=(8×4)+(8×2X)-(7X×4)-(7X×2X)
=32+16X-28X-14X^2
=32-12X-14X^2
F=(10X-8)(3X-3)
=(10X×3X)-(10X×3)-(8×3X)+(8×3)
=30X^2-30X-24X+24
=30X^2-54X+24
G=(7X-4)(-5X)
=-(5X×7X)+(5X×4)
=-35X^2+20X
H=-7X(-11X-7)
=(7X×11X)+(7X×7)
=77X^2+49X
Explication:Appliquer la distributivité et réduire si possible.
Voilà je crois tu as tout compris alors ,continue maintenant ☺