Haakjes wegwerken
Herleid.
1p
\((8 a + 7 b)^{2}\)
○
\((8 a + 7 b)^{2} = 64 a^{2} + 112 a b + 49 b^{2}\)
1p
Herleid.
1p
\((4 x - 3)^{2}\)
○
\((4 x - 3)^{2} = 16 x^{2} - 24 x + 9\)
1p
Herleid.
1p
\((p - 8)^{2}\)
○
\((p - 8)^{2} = p^{2} - 16 p + 64\)
1p
Herleid.
1p
\((7 a - 4 b) (7 a + 4 b)\)
○
\((7 a - 4 b) (7 a + 4 b) = 49 a^{2} - 16 b^{2}\)
1p
Herleid.
1p
\((6 p + 4) (6 p - 4)\)
○
\((6 p + 4) (6 p - 4) = 36 p^{2} - 16\)
1p
Herleid.
1p
\((x + 9) (x - 9)\)
○
\((x + 9) (x - 9) = x^{2} - 81\)
1p
Herleid.
1p
\((4 a - 7) + (2 a - 6)\)
○
\((4 a - 7) + (2 a - 6) = 4 a - 7 + 2 a - 6 = 6 a - 13\)
1p
Herleid.
1p
\((-8 x - 5) - (9 x + 7)\)
○
\((-8 x - 5) - (9 x + 7) = -8 x - 5 + -9 x - 7 = -17 x - 12\)
1p
Herleid.
1p
\(-3 + (-9 x - 6)\)
○
\(-3 + (-9 x - 6) = -3 - 9 x - 6 = -9 x - 9\)
1p
Herleid.
1p
\(4 - (2 p + 7)\)
○
\(4 - (2 p + 7) = 4 - 2 p - 7 = -2 p - 3\)
1p
Herleid.
1p
\((-9 x - 8) (7 y + 6)\)
○
\((-9 x - 8) (7 y + 6) = -63 x y - 54 x - 56 y - 48\)
1p
Herleid.
1p
\((a - 5) (a - 7)\)
○
\((a - 5) (a - 7) = a^{2} - 7 a - 5 a + 35 = a^{2} - 12 a + 35\)
1p
Herleid.
1p
\((-2 x - 7) (9 x - 3)\)
○
\((-2 x - 7) (9 x - 3) = -18 x^{2} + 6 x - 63 x + 21 = -18 x^{2} - 57 x + 21\)
1p
Herleid.
1p
\(-5 (9 x - 3 y)\)
○
\(-5 (9 x - 3 y) = -45 x + 15 y\)
1p
Herleid.
1p
\(-6 (-9 x - 7)\)
○
\(-6 (-9 x - 7) = 54 x + 42\)
1p
Herleid.
1p
\(9 (-7 x - 4 y - 8)\)
○
\(9 (-7 x - 4 y - 8) = -63 x - 36 y - 72\)
1p
Herleid.
1p
\(-2 (5 x - 7) - 4 (9 x - 6)\)
○
\(-2 (5 x - 7) - 4 (9 x - 6) = -10 x + 14 - 36 x + 24 = -46 x + 38\)
1p
Herleid.
1p
\(-2 a (-9 a + 6)\)
○
\(-2 a (-9 a + 6) = 18 a^{2} - 12 a\)
1p
Herleid.
1p
\(a (a + 4) (a + 6)\)
○
\(a (a + 4) (a + 6) = a (a^{2} + 10 a + 24) = a^{3} + 10 a^{2} + 24 a\)
1p
Herleid.
1p
\((x - 3) (x - 9) (x - 4)\)
○
\((x - 3) (x - 9) (x - 4) = (x - 3) (x^{2} - 13 x + 36) = x^{3} - 13 x^{2} + 36 x - 3 x^{2} + 39 x - 108 = x^{3} - 16 x^{2} + 75 x - 108\)
1p