Toán Lớp 8: Bài 5: Tìm x, biết:
A) (-x + 5 ) (x – 2 ) + ( x – 7) (x+7) = ( 3x + 1) ^2 – (3x-2) (3x+2)
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Toán Lớp 8: Bài 5: Tìm x, biết:
A) (-x + 5 ) (x – 2 ) + ( x – 7) (x+7) = ( 3x + 1) ^2 – (3x-2) (3x+2)
² ² ² ² ² ² ² ² ² ² ² ²
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