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3 years ago

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Can anyone help with this

2 answers:

vesna_86 [32]3 years ago

8 0

I would be able to but i left my maths book at school and that has the explanation in, sorry :(

Marat540 [252]3 years ago

4 0

(g +5)x(2g +g) when something is together like this,2g,then u multiply 2 x g.
but i'm not sure what the paper says . because i dont know what the letters mean.but here u go

A.<span>(<span>g+5</span>)</span><span>(<span><span>2g</span>+3</span>)</span><span>=<span><span>(<span>g+5</span>)</span><span>(<span><span>2g</span>+3</span>)</span></span></span><span>=<span><span><span><span><span>(g)</span><span>(<span>2g</span>)</span></span>+<span><span>(g)</span><span>(3)</span></span></span>+<span><span>(5)</span><span>(<span>2g</span>)</span></span></span>+<span><span>(5)</span><span>(3)</span></span></span></span><span>=<span><span><span><span>2<span>g2</span></span>+<span>3g</span></span>+<span>10g</span></span>+15</span></span><span>=<span><span><span>2<span>g2</span></span>+<span>13g</span></span>+<span>15

do you understand?

B.</span></span></span><span>(<span>h+1</span>)</span><span>(<span><span>2h</span>−3</span>)</span><span>=<span><span>(<span>h+1</span>)</span><span>(<span><span>2h</span>+<span>−3</span></span>)</span></span></span><span>=<span><span><span><span><span>(h)</span><span>(<span>2h</span>)</span></span>+<span><span>(h)</span><span>(<span>−3</span>)</span></span></span>+<span><span>(1)</span><span>(<span>2h</span>)</span></span></span>+<span><span>(1)</span><span>(<span>−3</span>)</span></span></span></span><span>=<span><span><span><span>2<span>h2</span></span>−<span>3h</span></span>+<span>2h</span></span>−3</span></span><span>=<span><span><span>2<span>h2</span></span>−h</span>−<span>3

C.</span></span></span><span>(<span>r−4</span>)</span><span>(<span><span>2r</span>−7</span>)</span><span>=<span><span>(<span>r+<span>−4</span></span>)</span><span>(<span><span>2r</span>+<span>−7</span></span>)</span></span></span><span>=<span><span><span><span><span>(r)</span><span>(<span>2r</span>)</span></span>+<span><span>(r)</span><span>(<span>−7</span>)</span></span></span>+<span><span>(<span>−4</span>)</span><span>(<span>2r</span>)</span></span></span>+<span><span>(<span>−4</span>)</span><span>(<span>−7</span>)</span></span></span></span><span>=<span><span><span><span>2<span>r2</span></span>−<span>7r</span></span>−<span>8r</span></span>+28</span></span><span>=<span><span><span>2<span>r2</span></span>−<span>15r</span></span>+<span>28

I hope it helps</span></span></span>

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