Bonsoir;
a) x-5+9
= 5-5+9 = 9
b). 3 × x 2 × x
= 3*5 *2*5 = 15*10= 150
c). 12x =
12*5 =60
d). 7+3x²
7+3*5²
= 7+3*25
= 7+ 75
= 82
e) x+x²-10
= 5+25-10
= 20
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Bonsoir;
a) x-5+9
= 5-5+9 = 9
b). 3 × x 2 × x
= 3*5 *2*5 = 15*10= 150
c). 12x =
12*5 =60
d). 7+3x²
7+3*5²
= 7+3*25
= 7+ 75
= 82
e) x+x²-10
= 5+25-10
= 20